By David Shepardson WASHINGTON (Reuters) -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,

Delta Air Lines is using AI to set personalized ticket prices based on your booking history, loyalty status and browsing behavior, expanding from 3% to 20% of flights by year-end.

Delta Airlines is facing criticism for its use of artificial intelligence to determine ticket prices, a practice known as surveillance pricing.