航空订票管理系统，可以进行查询，预览，退票，票价和机舱等进行相应操作-Airline reservation management system that can query, Preview, refund fares and cabin accordingly

航空订票系统,实现订票过程中的每步骤用的是vb,不错(Airline reservation systems, the realization of each step in the process of booking with vb, good)