21. We waited for John in the lobby of the airport.

我们在机场的大厅里等约翰。

22. I’d like to buy an excursion pass instead.

我要买一张优待票代替。

23. I’d like a refund on this ticket.

我要退这张票。

24. I’d like to have a seat by the window.

我要一个靠窗的座位。

25. You have to change at Chicago Station.

你必须要在芝加哥站转车。

26. We have only one a day for New York.

到纽约的一天只有一班。

27. Sorry, they are already full.

抱歉，全部满了。

28. I’d like to reserve a seat to New York.

我要预订一个座位去纽约。

29. The flight number is AK708 on September 5th.

班机号码是9月5日AK708。

30. There’s a ten thirty flight in the morning.

早上10点半有班机。