What is the most probable relationship between the two speakers?

M: I hope you can understand my reasons for deciding to leave, Mrs. Harrison.
W: Do I have to remind you that we have invested a lot of time and money in your career here? I hope you will have a second thought about your decision.

W: Do you know Yao Ming?
M: Yes. He is one of the best basketball players in the world. He is well-known not only in China, but also in many other countries all over the world.