Zo, developed by Zocdoc, is an innovative AI-driven phone assistant designed to swiftly manage inbound scheduling calls, eliminating the frustration of hold times and traditional IVR systems while efficiently booking patient appointments directly into existing electronic health record (EHR) systems through natural, conversational dialogue. This tool can handle an unlimited number of concurrent calls around the clock, autonomously addressing up to 70% of scheduling inquiries and only passing more complicated issues to human staff as necessary. Zo can be tailored to fit the specific booking protocols of different practices, integrates flawlessly with their telecommunication and EHR systems, and smartly directs patients by, for example, sending routine requests to nurse practitioners while reserving more complex matters for physicians. Practices are charged only for successfully scheduled appointments, avoiding any upfront costs, per-minute fees, or lengthy contracts, thus presenting a low-risk option for implementation. Initial users have reported that average call resolution times are under 3 minutes and 30 seconds without any hold time, coupled with patient satisfaction ratings that surpass 80%. This level of efficiency not only enhances workflow but also significantly improves the overall patient experience.