What’s the probable relationship between the two speakers?

W: Need I take some medicine?
M: Yes. And I strongly advise you to go on a low-fat diet.
W: Do you really think that’s really important?
M: Of course. If you don’t, you might have a heart attack some day.
W: Well, I think I should follow your advice. You have been very helpful. Thanks.

M: Did you watch the midnight film last night?
W: Yes, I watched part of it.
M: I really liked it. I thought it was really exciting.
W: Exciting? I fell asleep during the film.