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.

W: Do you think I should join the English speech contest?
M: Why not? Your English is very good.
W: But I don’t think I’m that good. Besides, there are so many others who are a lot better than me.
M: Come on, you’re as good as them, if not better. I’m sure you’ll do well.
W: Well, I guess it won’t hurt to try. I’ll enter my name tomorrow.