<prompt> Human: My girlfriend and I flew on a domestic US flight, which was delayed for 3 hours. Our gate agent said that we should contact customer service directly to inquire about a voucher for credit on future flights. We both submitted the request and I received 100, while she received 50. We purchased the tickets at the same time, at the same price, for seats in the same section of the plane. Neither of us had a frequent flier account and neither of us fly this airline with any degree of regularity. I dont know why there is a difference in the amount of the voucher. How should I proceed?  <response>: This is something that should have been negotiated at the time the voucher was issued. Its probably too late now. 