Build an AI voice agent for appointment booking in 2 days

Tools required

• Vapi ↗

  Voice agent platform

• GPT-4o or Claude

  Conversation brain

• Google Calendar / Calendly API

  Slot management

• Twilio

  Phone number

Steps

1. 1

   Define call flows

   Map 4-5 scripted scenarios: new patient, returning, reschedule, FAQ, escalate.

2. 2

   Create Vapi assistant

   Set voice, model, system prompt, max duration. Add function-calling for calendar.

3. 3

   Wire calendar function

   Vapi calls a webhook → looks up slots → returns 3 options to the caller.

4. 4

   Hindi tuning

   Use ElevenLabs Hindi voice or Sarvam. Test 20 calls; tune prompt for natural code-switching.

5. 5

   Buy + connect Twilio number

   Forward client's existing line during off-hours.

6. 6

   Soft launch + monitor

   First week: read every transcript. Adjust prompt + add edge cases.