A Muslim family of five is demanding a formal apology from United Airlines after being kicked off a flight in Chicago last month, CNN reported.

After the parents asked a flight attendant how they could secure a child booster seat, a United Airlines employee ordered the family to exit the plane for "security reasons."

Ahmed Rehab of the Council on American-Islamic Relations (CAIR) emphasized it is not the first time that Muslim passengers have been removed from flights for the "flimsiest reasons." The airlines said the incident was related to the booster seat, but the family, which was not convinced, is demanding a formal apology.