A computer reservation system, CRS as its known, is web based travel agency software. It provides travel agencies / travel management companies a 24/7 interface to its customers to search and book the flights, hotels, transfers, sightseeing, holiday packages. Travel reservation system supports B2C - end user module, B2B - agent module, B2B2B - sub agents and while-label. For flight inventory, it interfaces with GDS systems like Amadeus, Galileo / Travelport and Sabre, for hotel inventory / hotelextranet, it interfaces to GTA, Hotelbeds, Hotelspro, Travco, Tourico, DOTW, Bonotel, WCT and others. CRS - computer reservation system connects to all the providers through web services XML/API and bring the data of availability and pricing in run time. Users can search for flights, hotels, cars and packages in runtime, select & make the payment and get the confirmation voucher at the same time.