When a guest confirms her reservation at a hotel but does not guarantee it with an advance deposit,
it is treated as a non-guaranteed reservation.
In this type of reservation,
the hotel informs the hotel about her late arrival.
The cancellation hour is the time fixed by a hotel after which a non-guaranteed reservation stands cancelled and the room is released to a walk-in guest–
it is generally 06:00p.m. 0r 18:00 If the guest does not arrive by the cancellation hour , the hotel is free to release the room to any other guest.