Side-by-side images of Susan Berry and an American Airlines aircraft.Susan Berry/AaronP/Bauer-Griffin/GC ImagesSusan Berry's American Airlines flight from Italy to Philadelphia was overbooked.She offered to be bumped and was given a $1,200 flight voucher, free food, and a hotel stay.The route continued to be overbooked, so she stayed as long as possible, collecting $3,550 in vouchers.When American Airlines gate agents announced they needed volunteers to step off an overbooked flight, Susan Berry didn't hesitate to raise her hand.Berry, who had spent two months in Italy, didn't want her trip to end.