The reservationists usually receive a reservation inquiry by phone, in the mail, in person, by e-mail or through a central reservation system. Hotel guests may choose to make a non-guaranteed reservation if they expect to arrive at the hotel before the reservation cancellation time. Most hotels set their cancellation time at 6:00 p.m. on the day of arrival. This kind of reservation dose not guarantee the hotel’s payment for an unused room. If guests do not arrive by the cancellation times, the hotel will sell the room to others if there is a chance. When the hotel is nearing full occupancy, as with conventions, it may choose to accept only guaranteed reservations. When a hotel is fully booked, it is customary to stop processing further reservation requests. However, if an inquiry is made sufficiently in advance, the party can choose to be put on a waiting list. This method is most commonly used in high-volume areas for peak days and seasons. If demand is unusually high, this hotel can also refer guests to other hotels in the area.