Waiter: What would you like?
服务员：你们想吃点什么?

Guest: We'd like to have western food today. Could you tell us something about it?
顾客：我们今天想吃西餐，能给我介绍一下吗?

Waiter: Sure. The first food you have is appetizer followed by a soup. Then you will have the main course. The last dishes are deserts.
服务员：可以。西餐的第一道菜是开胃餐，然后是汤，接下来是主食，最后一道是甜点。

Guest: Well, it's quite different from the Chinese food.
顾客：看来和中餐是有很大不同的。

Notes:
appetizer n.开胃餐
main course  主食，主菜
desert n.甜点