预订功能：其主要目的是提高酒店的开房率，为客人预留房间，并提供良好的预订服务。其功能需求包括预订查询，可用房确认，预订记录建立，预订确认，预订记录维护等；-Book features: its main purpose is to improve the hotel s opening room rates, reserved for the guest room, and provide a good booking service. The functional requirements i