第一句：I'd like to make a plane reservation to Shanghai, China.

　　我想预定一个去中国上海的机位。

　　A: Good morning, Chinese Airlines. Domestic reservations.

　　早上好。中国航空公司。国内航班预定处。我能帮您吗？

　　B: Yes. I'd like to make a plane reservation to Shanghai for tomorrow.

　　是的，我想预定一张明天去上海的机票。

　　第二句：I'd like to get a seat on a flight to Amsterdam.

　　我想订一张飞往阿姆斯特丹的机票。

　　A: Good afternoon, Swiss Airlines. International reservations. May I help you?

　　下午好，瑞士航空公司，国际航班预订处。我能帮您吗？

　　B: Yes, I'd like to get a seat on a flight to Amersterdam tomorrow.

　　是的，我想订一张明天飞往阿姆斯特丹的机票。

　　A: Just a moment, please. I'll check for you.

　　请稍等，我给您查一下。

　　预定机票的相关表达还有：

　　I'll treat myself to a business-class ticket.

　　我想为自己订张商务舱的票。

　　I'd like to reserve a ticket for the flight from Tokyo to London.

　　我想预定一张从东京到伦敦的机票。

　　I want to reserve a flight to China.

　　我想订张飞往中国的机票。