curl --request PUT \
  --url https://api.novacal.io/v1/events/{id}/cancel \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "cancellation_reason": "<string>"
}
'

{
  "success": true,
  "data": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "start": "2023-11-07T05:31:56Z",
    "end": "2023-11-07T05:31:56Z",
    "canceled_at": "2023-11-07T05:31:56Z",
    "cancellation_reason": "<string>",
    "location": "<string>",
    "form_field_answers": {
      "name": "John Doe",
      "email": "john@example.com"
    },
    "status": "<string>",
    "name": "<string>",
    "organizer": {
      "first_name": "<string>",
      "last_name": "<string>",
      "name": "<string>",
      "email": "jsmith@example.com",
      "username": "<string>",
      "timezone": "<string>",
      "avatar": "<string>"
    },
    "hosts": [
      {
        "first_name": "<string>",
        "last_name": "<string>",
        "name": "<string>",
        "email": "jsmith@example.com",
        "username": "<string>",
        "timezone": "<string>",
        "avatar": "<string>"
      }
    ],
    "booker": {
      "name": "<string>",
      "email": "jsmith@example.com",
      "timezone": "<string>"
    },
    "guests": [
      "jsmith@example.com"
    ]
  }
}