# AvailabilityBooking

object type

One RESERVED booking overlapping the asked window.

## Fields

| Field | Type | Notes |
| --- | --- | --- |
| `appointmentId` | [ID](/types/#scalars) `ID!` | No further notes. |
| `startAt` | [String](/types/#scalars) `String!` | The window start (UTC instant). |
| `endAt` | [String](/types/#scalars) `String!` | The window end, exclusive (start + duration — UTC instant). |