3. transmit request
7A. send search result
9A. choose a servant
[success] 14Aa. return servant informations
:SearchServantGUI
[exist result] 6A. return search result
12A. ask for informations
15Ab. send fault message
Customer
Database
7B. send fault message
2. send request
[else] 14Ab. return fault message
15Aa. send servant informations
5. search conditions
10A. send request
1. choose screening conditions
[else] 6B. return fault message
8A. return search list
11A. transmit request
16Ab. look up information failed
4. ask for searching conditions
16Aa. look up information succeed
8B. cannot look up servant informations
Server《control》
ManageTransaction《control》
13A. execute request
