Travel vendor databases may include databases for travel related services such as airlines, car rental, hotel, train, bus, limousines, and any other travel related service. As used in the system of the present invention, a database may be any type of database, such as relational, hierarchical...
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. The database may also include personal preferences for individuals such as seat preferences (aisle or window) and frequent flyer information. Unused ticket information may also be stored in the customer data module database so that it may be utilized by the low fare module as described above...