sequence diagram
2016-05-06 16:10:25 94 举报travel agency 时序图
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9:buy a travel package
:Hotel
3:return airline list and information
5:return hotel room list and information
7:return hotel room list and information
8:return the list and information
12:return transaction finished
2:inquire about airline list and information
:Customer
:Airline Company
11:provide information
1:inquire about the list and information
:Car Rental Company
:Travel Agency System
10:create an order
6:inquire about cars list and information
4:inquire about hotel room list and information
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