# 1-on-1 with Luka with Luka Sinclair

> Description: 15 minutes. Just Luka — founder of NATALIS — focused entirely on your business and what's not working. No pitch deck. No generic demo. No scripted call with a rep who doesn't know your trade. This is a direct conversation about where your operation is leaking revenue — missed calls after hours, quotes that never get followed up, reviews that never get requested — and whether NATALIS can fix it. We build automated systems that handle what most trade businesses are doing manually or not doing at all. If it's a fit, I'll show you exactly what that looks like for your business. If it's not, you'll walk away knowing where the gaps are.

- Host: Luka Sinclair
- Duration: 15 min
- Location: Zoom Video, Google Meet, Cal Video
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/luka-sinclair-kowuvl/15min
- Event type id: 4838203

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=4838203&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": 4838203,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "bookingFieldsResponses": {
    "attendeePhoneNumber": "…",
    "title": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `attendeePhoneNumber` (Phone number)
- Optional fields: `title` (What's your biggest operational headache right now?)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.
- `location` is optional; without it the booking uses the event’s first location.