What is the conversation mainly about?

M: I am so relieved I’ve just finished my assignment for my writing course.
W: I haven’t yet. I had trouble getting pass the beginning.
M: How come?
W:  Well, I really want to have a detective story. But after the first few pages, I just couldn’t write any more.
M: The same thing happened to me. I thought it meant I lack imagination.
W: Well, Prof. Wilson said it’s pretty common for writers to get stuck like that.
M: You went to talk to her about it?
W: Actually, I went to ask for more time to finish the assignment.  But she said that the first thing I should do is just write anything that come into my head even if it doesn’t make any sense, sort of warm-up exercise.
M: That is interesting. When I get stuck, I shift to something else, you know, do some work for my other courses.
W: Well, her method seems to have worked for me. I should be able to hand it in on time. But first I need to go to the jewelry store.
M: You are going shopping? Now?
W: I am going there for my story. My detective solves a jewelry store robbery. So I want to take a look at how the jewelry cases are arranged, and where the security cameras are located, that sort of thing.