X: I'm afraid I've got to go. I have another appointment at five.
Y: Do you? By the way, could you mail this letter for me as you go through the lobby?
X: No problem.
Y: Thank you. Come back to my room at the same time tomorrow. I'll have the pictures ready by then.
X: I will.
X:恐怕我必须走了,我在五点钟有另一个约会。
Y:是吗?对了,你经过大厅时顺便帮我寄这封信好吗?
X:没问题。
Y:谢谢。明天同一时间请到我房间来,那时我会把相片准备好。
X:我会的。