Example: AI appointment booking

# Appointment booking
You can use Google Calendar tools: get_availability, create_event,
check_existing_events, reschedule_event, cancel_event.

When the caller wants an appointment:
1. Ask what the visit is for (if you do not already know).
2. Ask for a preferred date and time (interpret times in IST unless they specify).
3. Call get_availability for that window.
4. If busy, offer the next two free slots. Do not invent a free time.
5. Ask for full name and email.
6. Call create_event with start, end, summary, and attendee email.
7. Read back the confirmed time and say the invite is on its way.
8. If they decline every slot, offer a callback and do not create an event.

curl -X POST https://voice.trikon.tech/api/outbound-call \
  -H "Authorization: Bearer $TRIKON_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "to": "+919845012345",
    "agentId": "YOUR_BOOKING_AGENT_ID",
    "enterprise": "acmeclinic",
    "from": "YOUR_PHONE_LINE_UUID",
    "name": "Asha",
    "metadata": {
      "clinic_name": "Acme Clinic",
      "visit_type": "health checkup",
      "patient_email": "asha@example.com"
    }
  }'

CREATE TABLE appointments (
  id              UUID PRIMARY KEY,
  customer_name   TEXT,
  phone           TEXT NOT NULL,
  email           TEXT,
  slot_start      TIMESTAMPTZ,
  slot_end        TIMESTAMPTZ,
  status          TEXT NOT NULL DEFAULT 'pending', -- pending | booked | cancelled | no_show
  call_uuid       TEXT,
  transcript_note TEXT
);

async function onBookingWebhook(body: {
  event: string;
  callUuid: string;
  to: string;
  name?: string;
  intent?: string;
  summary?: string;
  transcript?: { speaker: string; text: string }[];
}) {
  if (body.event !== "analysis.completed" && body.event !== "call.completed") {
    return { ok: true };
  }

  const booked =
    body.intent === "appointment_scheduled" ||
    /booked|confirmed|scheduled/i.test(body.summary || "");

  await db.appointments.upsertByPhone(body.to, {
    customer_name: body.name,
    status: booked ? "booked" : "pending",
    call_uuid: body.callUuid,
    transcript_note: body.summary,
  });

  return { ok: true };
}