courtesy

The staff at the five-star hotel treated every guest with great courtesy and professionalism.

(Chinese) 五星级酒店的工作人员以非常有礼貌且专业的态度对待每一位客人。

It is a basic courtesy to call if you are going to be late for a meeting.

(Chinese) 如果你开会要迟到，打个电话告知是基本的礼貌。