Another travel company is jumping into the fight with American Airlines over ticket information.

Sabre Holdings, which runs a computer system that allows travel agents to see flight and fare information, said it will end its contract with American in early August. Until then, American fares will show up lower on lists viewed by travel agents.

Sabre said the move does not affect its online booking site, Travelocity.

American pulled its flight listings from Orbitz last month when the companies couldn’t agree on a new contract. Online booking site Expedia dropped American flight listings last weekend.

Sabre is a “global distribution system” that catalogs airline fares and schedules for clients such as American Express and other travel agencies. They serve mostly business travelers, the most prized customer for American and other airlines.