i'd like a table for three or four at seven.
我想订7点钟的3人或4人桌位。
please reserve a table for three.
请预留一个3人桌位。
i'm sorry, i'll be about thirty minutes late.
抱歉，我将晚到30分钟左右。
do i have to be formally dressed?
我必须穿正式服装吗?
b：good evening. how many people do you have in your party?
晚上好。你们有几位?
a：two.
两位。