# Free 30mins Trial Class with Chrisvietnamese

> The best way for you to discover a tutor who is suitable for you! Try your best tutor now before starting an amazing learning journey together. Let's conquer this language together today! 🌍🗣️

- Host: Chrisvietnamese
- Duration: 30 min
- Location: https://us06web.zoom.us/j/9296919840?pwd=V2pMLzlobXVaYk1vUjViYURFdXZ5QT09
- Host time zone: Asia/Ho_Chi_Minh
- Confirmation: Bookings are confirmed instantly.
- Payment: required, and collected on the booking page.
- Booking page: https://cal.com/chrisvietnamese/trial
- Event type id: 876712

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=876712&start=YYYY-MM-DD&end=YYYY-MM-DD&timeZone=<IANA time zone>
cal-api-version: 2024-09-04
```

The response is `{"data":{"YYYY-MM-DD":[{"start":"<ISO 8601 with offset>"}]}}`; no API key is needed.

## Book

```http
POST https://api.cal.com/v2/bookings
cal-api-version: 2026-02-25
Content-Type: application/json

{
  "eventTypeId": 876712,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "bookingFieldsResponses": {
    "Ideal-class": "…",
    "ideal": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `Ideal-class` (Can you describe shortly about Your Vietnamese and You?), `ideal` (Since I work with Adults and Teenagers, may I know if you are older than 15 years old?)
- Optional fields: none
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.