In this week’s air travel news, three U.S. senators are demanding that Delta Air Lines answer some pointed questions about its expanding use of artificial intelligence in setting airfares; Southwest outlines the rules for its new assigned seating system,

Delta Air Lines is set to expand the use of artificial intelligence to determine airfare after testing a pilot program which used AI to set 3 percent of the airline’s airfare, but privacy advocates and government officials are concerned that it could lead to price hikes and discriminatory pricing.

Ever since Delta mentioned it is using AI to set prices on domestic flights, the backlash against the carrier has grown.