Online booking engine

I'm looking for package platform which offers a flexible content management and online distribution solution for tour operators. Packages can be sold as pre-defined fixed price packages (static packaging) or as flexible components mixed within a price range. The flexible package allows end customer to choose different options to compose their package within the same price range. costumer can easily select a different flight, car or hotel available for the same package price (Flexible packaging). The packaging platform is suited for multi channel distribution: B2C,B2B2C,B2B. features needed: -Multi level mark-up management -Wholesaler calculation /B2B mark-up /B2C/B2B2C mark-up/Call Centre mark-up -Dynamic assembly of multiple components. -Add-ons /Cross selling -Flexible Component-based pricing or static pricing -Multi channel distribution: B2B,B2B2C,B2C,Call centre -Dynamically create and price multiple component itineraries for single or multiple destination itineraries. -Air content can be based on consolidator contracted fares (own chartered flights), GDS published fares, web fares and low-cost carriers. -Hotel content acquired via Hotel XML based interface. -Car content acquired via XML based interface. Best Regards, this project is urgent! We are closing the bid in 5 days