1. I'd like to book a table for dinner this evening.
我想订一张今晚的餐桌。
还能这样说：
I want to book a table to have dinner in this evening.
Can I book a table for this evening?
应用解析：
an open book 尽人皆知的事情；容易理解的人；
a closed book 未揭开的秘密，高深莫测的事物；
be at one's books 用功学习；
be in sb.'s bad books 失去某人的欢心
2. If possible, we'd like a table in a private room.
如果可能的话，我们希望要一张包间的餐桌。
还能这样说：
We want to book a table in the private room if possible.
If it is possible, we want to reserve a table in a private room.
应用解析：
in private 秘密的，私下的。
例如：I want to meet you in private.
我想单独与你见面。
3. How late are you open?
你们晚上营业到几点？
还能这样说：
When will you close the door?
What's your closing time?
4. Can we order ahead of time?
我们可不可以提前订餐？
还能这样说：
Can we book a table in advance?
Can we make a reservation for the dinner?