Mary：

I'd like to make a reservation to New York for next Monday.

我想预定一张下星期一去纽约的机票。

Clerk：

Just a second and I'll check the schedule.

请稍等，我查一下时刻表。

Mary：

I'll need an economy ticket with an open return.

我要一张经济舱，回程时间不定的来回票。

Clerk：

TWA has a flight leaving at 9:00.

TWA有一班飞机，9点起飞。

Mary：

I guess that's O.K. What time should I check in?

我想很好。我应该在什么时候登机?

Clerk：

You have to be there half an hour before departure time.

你要在起飞前半小时到。