# Using Reservations

Whether a session uses reservations is determined by the `"USERESERVATIONS"` session setting. When this setting is enabled, the session will make use of reservations automatically. No additional code is required. Reservations are enabled by default.

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Only **Game Sessions** make use of reservations.
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**When hosting** a reservation enabled session, a `KronosReservationHost` beacon will be initialized automatically during game mode initialization. This beacon is responsible for handling reservation requests.

**When joining** a reservation enabled session, reservations will be requested automatically during the joining process using a `KronosReservationClient`. Reservations will be made for the local player and each party member. If the reservation request fails, the session is deemed invalid and matchmaking continues.