第一句：Could you ask him to call me back at 87304450?
请让他给我打电话，电话号码是87304450。
A: Good afternoon. This is Wenkai Yang speaking. Can I talk to Mark?
下午好，我是杨文恺，我找马克听电话。
B: He's out on his lunch break right now. Would you like to leave a message?
他现在出去吃午饭了，你要留言吗?
A: Could you ask him to call me back at 87304450?
他回来后请让他给我打电话，号码是87304450.
B: OK, I'll tell him when he comes back.
好的，他回来后我会转后他的。
第二句：Will you ask him to call me back later?
你能告诉他待会儿给我打电话吗?
A: Hello. May I speak to Mr. Brown?
喂，布朗先生在吗?
B: I'm sorry, he is not in now. Would you like to leave a message?
对不起，他现在不在。您想要留言吗?
A: Will you ask him to call me back later?
你能告诉他待会儿给我打电话吗?
B: I'll let him know.
我会转告他的。
这个句型适用于找不到对方或对方有事不能前来接听时，留下自己的联络方式，请其回电。“at”之后可接地点或电话号码。
“Could”是请求或征询时的助动词，用于请求、委托时，语气谦和客气。说明要留言时可以用：
Can I leave him a message? 我可以留言吗?
