You have to book a flight and a hotel.

你得预定航班和酒店。

I'll book a flight ticket on a website.

我在网上订机票吧。

She needs to book a flight to San Diego next week.

她需要预定一个下周去圣地亚哥的航班。

I need to book a flight to Sydney today please.

我要订一张今天到悉尼的机票。

Id like to book a flight to New York for this Wednesday.

我想订一张这周三去纽约的机票。