The disclosure herein includes a method for controlling elevators by an intelligent building system. The method includes receiving, by the intelligent building system, elevator calls initiated by passengers. Each elevator call can include a passenger identification corresponding to a passenger initiating the elevator call. The method further includes procuring passenger preference information based on the passenger identifications in response to the elevator calls and grouping the passengers with respect to the passenger preference information to produce passenger groups. The method further includes controlling the elevators to collect the passenger groups.