Three Democratic senators have pressed Delta Air Lines CEO Ed Bastian to answer questions about the airline's planned use of artificial intelligence to set ticket prices, raising concerns about the impact on travelers.

Delta Airlines is reportedly expanding its use of AI-driven dynamic ticket pricing—a move that has faced significant pushback online. Delta President Glen William Hauenstein told reporters earlier this month that the company is ready to move forward with using AI to set fares—a system that already determines 3-percent of the airline’s domestic ticket prices.