084.
M: Hello, University Books. Joe Smith speaking.
W: Hi, Joe, this is Ann.
M: Oh. Hi, Ann. What's up?
W: Well, the Student Federation needs a couple of volunteers to give guided tours to the new students during orientation next week. Would you be able to help out?
M: That depends on the days you had in mind. I'm working here full-time before classes begin. It's really busy now, with all the textbook orders coming in, but I do have some time off.
W: What about Saturday? Most new students arrive on the weekend.
M: Sorry, I have to work all day Saturday. How about Thursday and Friday? I've got both mornings free.
W: I don't have the schedule on me. Lucy's got it. Maybe you can set something up with her.
M: Yeah... Look, I've got to go. I've to get all the orders out before I leave today.
W: OK, thanks. Bye.

参考答案：
(1) Give guided tours
(2) Next week
(3) Wroking here full-time
(4) Most new students
(5) Thursday and Friday