4-1   I'd like a round-trip ticket.     

I'm going to New York.   I'm leaving next Friday.  

I'd like a around-trip ticket.   I want to go economy.  

Do you have special fares?   Do you have promotional rates?   My departure time is flexible.   I don't mind a stopover.   I want an unbeatable price.

4-1 我要去纽约。我下星期五走。

我要一张来回票。我要坐经济舱去。

你们有没有特别的票价？你们有没有促销价？我的出发时间很有弹性。

我不介意中途停留。我要最棒的价钱。