curl -X PUT "https://app.talkover.ai/api/v1/calendars/calendar-uuid-1/events/event-uuid-1" \
  -H "Authorization: Bearer talq_your_environment_token_here" \
  -H "Content-Type: application/json" \
  -d '{ "status": "cancelled" }'

{
  "success": true,
  "data": {
    "id": "event-uuid-1",
    "status": "cancelled",
    "updated_at": "2024-01-15T19:00:00Z"
  }
}