A system for biasing suggested room and/or resource search results based on user behavior related to rescheduling and/or canceling existing resource reservations. The system uses historical data, statistical analysis, and heuristics to generate suggestions as to which users may be willing and/or able to give up their existing resource reservations for a particular time slot. By monitoring which users reschedule and/or cancel existing reservations, and how often they do so, the system is able to provide a user in need of a previously reserved room/resource with a prioritized list indicating which other users with existing resource reservations during the desired time slot are relatively more likely to cancel their reservations, and/or to transfer their reservations to the scheduling user.