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# reservationId

A stable, unique identifier for the reservation.

```
string reservationId
```

## Discussion

Use a consistent, unique identifier for each reservation. If you also provide reservation information with <doc://com.apple.documentation/documentation/SiriKit/siri-event-suggestions> in your app, use a single, consistent value for that <doc://com.apple.documentation/documentation/Intents/INReservation/reservationNumber> and this `reservationId`.

---

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