Abstract: The subject matter of this specification can be embodied in, among other things, a process that includes selecting accommodations during a travel reservation is described. The method includes receiving, at a software application that manages travel reservations, input that customizes configurable attributes of software travel objects representing accommodations used in transportation of passengers. The method also includes receiving criteria from a customer specifying preferences that affect a passenger's experience during travel, ranking the received criteria so that one or more criterion are preferred, selecting one or more of the accommodations using an optimization function to compare the ranked criteria to the customized configurable attributes, and outputting the selected one or more accommodations for use by the customer in selecting a first accommodation for the passenger.