The travel products such as air tickets, hotel rooms, car rentals are the perishable products which have a lifetime, so they should be sold or rented early.

Through the forward auction sites, suppliers’ ability to sell their products is high, but consumers cannot be sure about their opportunity to get the products that they really want.

Therefore, the reverse auction is applied for trading these products.

At the current time, the buying and selling transactions are widespread commodiously in Electronic Commerce. The variety in types of products makes difficulties for customers when choosing the some suitable products to their taste.

Supporting customers in making purchase decisions is necessary.

- Le Thi Nhan, Le Thuy Anh and Duong Anh Duc, Applying the Online Bidding Model in Hotel Room Assigment Problem, 3rd International Conference on Computer Science - Recherche, Innovation & Vision du Futur (RIVF2005), Can Tho, Vietnam, Feb 21-24, 2005.

- Le Thi Nhan and Vatcharaporn Esichaikul, A Last-Minute Auction in Hotel Industry, 4th Scientific Conference of Ho Chi Minh City University of Natural Sciences, Ho Chi Minh, Vietnam, Oct 2004.