Thanks, Emily, and thanks, everyone, for joining our call this afternoon. I'm pleased to share that we finished the year with strong results. Fourth quarter revenue grew 15% year-over-year and full-year revenue grew 17%. This increase continues to be primarily driven by our Enterprise business, with LTM subscription revenue growing 25% year-over-year. Adjusted EBITDA margin for the fourth quarter was 20% of revenue, helping drive a Q4 record for operating cash flow of $37 million, or 15% of revenue. As you all know, we take a balanced approach to delivering top-line growth and bottom-line profitability. Today I'd like to start off by commenting on the market opportunity ahead for Five9. We believe the market has never been better for large enterprises to move to the cloud. We are continuing to see strong momentum upmarket with new logos, as evidenced by our Q4 record in Enterprise bookings. In addition, our pipeline continues to grow, hitting another record high. We are seeing acceleration at the top of the funnel with Enterprise's strategic RFPs more than doubling year-over-year, which is a strong indicator of our market being at an inflection point. This market opportunity is being driven by three key ongoing trends. First, migration to cloud contact center platforms is becoming one of the highest priorities for enterprises, especially as many on-premise solutions are being end of life. With cloud penetration at approximately 20%, we believe there is a significant runway ahead. Second, Enterprises are laser-focused on improving customer experience and cloud contact centers are at the heart of enabling these businesses to reimagine their CX. And third, enterprises are increasingly leveraging AI to empower their businesses and cloud contact centers are becoming an imperative to deliver on their AI and automation initiatives. This market remains massive and underpenetrated and we believe this is a durable, multiyear opportunity. Now I'd like to remind you of the three main growth drivers of our business: our platform, our march up market and our international expansion. I'll start with the platform. We continue to strengthen our AI leadership in CX by infusing AI throughout our platform. We have been leveraging the power of generative AI to further expand AI-powered solutions such as Five9 chatbots and IVA. In addition, generative AI is enhancing many other offerings in our AI and automation portfolio, including AI insights and AI summaries, which are gaining meaningful traction. For example, year-over-year bookings growth for Agent Assist which includes AI Summaries accelerated in each of the last three quarters, culminating in a 6x increase in Q4. We believe much of this rapid growth can be attributed to the value we deliver to customers with our leading generative AI capabilities and our successful Try Before You Buy program. Our leadership in AI is also being widely recognized by the industry. We are excited to report that Five9 was named a global leader in the just released 2024 Aragon Research Globe for Conversational AI. The report provides an in-depth analysis of leading contact center vendor strategy and product strengths in conversational and generative AI. Additionally, in the most recent Baird channel survey from late December, we were named as the contact center provider with the best AI solutions. Overall, we continue to see significant momentum in this area with AI and automation making up 17% of our total ACV new logo bookings for enterprise in Q4. Additionally, AI and automation products now make up 7% of our Enterprise subscription revenue. Next, I'd like to talk about our data strategy. Data has become more important than ever in unlocking value in CX. How much data is collected, the number of data sources, the explosion of data types, and the secure and responsible use of that data are all becoming critical buying considerations for contact center decision-makers. The benefits of having a strong data strategy are clear. More personalization to create an amazing and differentiated customer experience is just the tip of the iceberg. Richer insights for key stakeholders in the contact center, including agents, managers and operators, make for better decisions. Leveraging data with AI drives critical improvements for self-service and up-leveling every agent to deliver the optimal customer experience. Five9 is the platform where customer experience data is created, utilized and actioned. We recognized this opportunity early on with the addition of Five9 data lake. To build upon this, we recently acquired Aceyus, a leading solution to accumulate, normalize and present rich and diverse data sources. We also integrate our data with other leading data sources in order to deliver exceptional customer experiences. We see data as the key to delivering a more personalized customer experience and this continues to be an important pillar of our platform strategy. As you can see, we significantly strengthened our platform throughout 2023 and we are continuing to make key investments to enhance our leadership position in the market. A good example is FedRAMP, which will be a multi-year investment. However, we believe it will ultimately open up a huge market opportunity, not just at the federal level, but also with the state and local governments that we believe will help us generate a meaningful new revenue stream long term. And now I'd like to focus on our march up market and international expansion. We continue to see strong momentum which Dan will touch on in a moment. As I mentioned earlier, enterprise and strategic RFPs are continuing to increase at a significant rate, which give us confidence in our ability to continue marching up market in 2024 and beyond. Also, I want to point to one of the key reasons we have been so successful in winning and deploying some of the largest enterprise accounts. We continue to get feedback from our customers that they chose us not only for our market -leading platform, but also because of our people. Our customer success model is a key differentiator. The vendor they choose must have the experts to ensure a smooth transition to the cloud, an improved customer experience and better business outcomes. And we have hundreds of CX experts globally that focus on transformation, migration, implementation and ongoing optimization. We also collaborate with some of the best CX partners in the world who also deliver a similar best-in-class experience. Our international expansion continues to be a growth driver. In 2023, international revenue grew 29% year-over-year. This strong growth was driven by the ongoing investments we are making, particularly in Europe. For instance, we expanded our footprint in the dock region by turning up local data centers and scaling our strong go-to-market team in that region. Also, we continued to strengthen our Porto engineering hub, increasing our headcount there by nearly 50% last year. Our success in marching up market and expanding internationally are increasingly being driven by our ever growing network of global partners and their dedication to leading with Five9. For example, we recently announced the listing of our intelligent CX platform on Google Cloud Marketplace, which simplifies the procurement of Five9 and helps Google customers retire their GCP spend commitments. Also, we recently launched our new and enhanced Five9 University for partners, which provides comprehensive product training and certification programs to enable these partners in sales, implementation and services. As a result, in 2023, the number of global partner sales certifications tripled year-over-year and partner implementations doubled during that same period. In addition, we had 51 partners who booked more than $1 million in ACV in 2023. Before I turn it over to Dan, I'd like to say that we remain extremely optimistic about the opportunities in this massive and underpenetrated market. We have the right platform and the right team to capitalize on this long-term and durable growth opportunity. And with that, I'll turn it over to our president and CRO, Dan Burkland. Dan, please go ahead.