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# reservationNumber

The reservation number.

```
var reservationNumber: String? { get }
```

## Discussion

Provide your system’s reference number for the reservation. Use a consistent, unique identifier for each reservation. If you also provide reservation information with <doc://com.apple.documentation/documentation/SiriEventSuggestionsMarkup> on your website or in emails, use the same value for the <doc://com.apple.documentation/documentation/SiriEventSuggestionsMarkup/reservationId> in the reservation markup.

For a multipart booking, such as round-trip travel, you may provide the same `reservationNumber` for each reservation.

---

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