501. Are there any flights on Tuesday afternoon?
502. Please reserve me a first class seat.
503. Smoking or non-smoking area.
504. What is the check-in time, please?
505. Is that the only direct flight that day?
506. Will you pay them by cash?
507. I will pay for them by traveller’s check.
508. You pay for it separately or together?
509. What time does it arrive?
510. I need a receipt, please.