They offer (0) NO guarantees (1) ............ the next suitable flight will be (2) ............ the next hour, or even the next day. If there are not (3) ............ volunteers, airlines take the next step — involuntary bumping. (4) ............ avoid this situation, it is important to be at the airport well (5) ............ of your scheduled flight time: the early bird gets the worm — and the aeroplane seat. Allow (6) ............ of time to get to the airport. Be aware of your carrier's check-in requirements, (7) ............ they vary from airline to airline. Often, the last passenger (8) ............ the gate and checked in is the prime candidate to be bumped.