Hello! This is Mary. Is that John speaking?你好！我是玛丽。你是约翰吗?Sorry. He's out. This is Sam.对不起。他出去了。我是山姆。Sam! Could you take a message to him?山姆!你能给他带个口信吗?Sure.当然。Please tell him to call me back this afternoon.请告诉他今天下午给我回电话。OK, I will.好的，我会的。