Can I book the tickets online?

　　我能在网上订票吗？

　　A: Do you know when you want to fly to Shanghai?

　　A: 你知道你什么时候想飞往上海吗？

　　B: Not yet, but I'll decide when I've checked everything on the website.

　　B: 还不知道，但是当我在网上查完的时候我就将做出决定。

　　A: Well, when you have decided, then you can book your tickets.

　　A: 哦，当你做出决定以后你就可以订票了。

　　B: Can I book the tickets online? Is that possible?

　　B: 我能在网上订票吗？可能吗？

　　A: Yes, I think so. It depends on the airline. And you'll need a credit card.

　　A: 是的，我想可以。这取决于航空公司。你还需要一张信用卡。

　　B: OK, I'll try. Hopefully, I can do everything online.

　　B: 好的，我试一试。但愿一切我都能在网上完成。

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　　Notes：

　　1. Remember how to use the verb depend / depend (usually with on/on or if / if) e.g.: I might go shopping on Saturday- it depends on the weather / I might go shopping on Saturday- it depends on the weather; It depends if the flight arrives on time / It depends if the flight arrives on time.

　　记住怎样使用动词depend /取决于(通常和on或者 if 一起使用)例如：I might go shopping on Saturday- it depends on the weather /我周六可能去购物——依天气而定；It depends if the flight arrives on time /这取决于航班是否能够准时到达。

　　2. You can talk about booking something online / booking something online, e.g.: I will book the tickets online / I will book the tickets online.

　　你可以谈论booking something online /在网上订购某物。例如：I will book the tickets online /我将在网上订票。