# One on one lessons with Gemma Helyer

> During our lessons, you are able to learn and confidently apply the UX process in any industry, by using problem-solving techniques and using a user-centred approach. We will discuss the basic principles of UX and tailor any lessons to your needs. You can also use this time to discuss a particular problem and we can work on solving it together using best practice techniques.

- Host: Gemma Helyer
- Duration: 90 min
- Location: Google Meet
- Host time zone: Europe/London
- Confirmation: The host confirms each booking; it stays pending until they accept it.
- Payment: required, and collected on the booking page.
- Booking page: https://cal.com/gemmahelyer/one-on-one-lessons
- Event type id: 1502557

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=1502557&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": 1502557,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address)
- Optional fields: `notes` (Additional notes), `guests` (Add guests)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.
- A successful response is a pending booking request.