Appointments (simple)
The easiest way to let an AI agent schedule appointments is by providing a calendar link when relevant.

Base System Prompt for Appointments
Simply add a line like this to your Base System Prompt:
If a user wants to schedule an appointment or book a meeting, send them to this link: {YOUR_CAL.COM_LINK}
When a user wants to book an appointment, they can just click the link and schedule directly.