第一句：When does the dining car open for dinner?

餐车什么时候供应晚饭呢?

A: Excuse me. When does the dining car open for dinner?

打扰一下，请问餐车什么时候供应晚饭呢?

B: It opens as soon as the train starts.

火车一出发就开饭。

第二句：What time does the dinning car serve the meal?

餐车什么时候供应食物?

A: And by the way, what time will we get to the Salt Lake City?

顺便问一下，我们什么时候到盐湖城呢?

B: We'll get in at around 4 o'clock in the afternoon.

我们将下午4点左右到达。

A: Thanks. What time does the dining car serve the meal?

谢谢，那餐车什么时候供应食物呢?

一日三餐的说法是：

breakfast 早餐

lunch 午餐

supper/dinner 晚餐

meal 是对三餐的总称