Why does the woman call Mr. Johnson?

W: Hello, may I speak to Mr. Johnson, please?
M: Speaking. Who’s calling, may I ask?
W: This is the Town Job Centre. We have received your E-mail and we are quite interested in you.
M: Can you tell me more about it? What kind of job? Where?
W: Well, a college wants to find some laboratory assistants. It’s the kind of job you would like to do, as we can see from your e-mail.
M: Yes, I did put that in my e-mail.
W: Yes. They also want a person who knows how to operate the computer, so we think you are just the right kind of person for the job.
M: What about the pay and the work hours?
W: I am coming to that. The pay they have offered is satisfactory, but the work hours are a bit changeable. Sometimes early in the morning, sometimes late in the afternoon.
M: Well, I am interested in it, but I need some more details so that I can talk it over with my wife.
W: Why don’t you come over here tomorrow?
M: OK, I’ll do that. See you tomorrow then. Bye!