What is the probable relationship between the speakers?

M: Hi, Sara. How’ s your speech for Professor Grey’ s class next Monday?
W: Actually, I’ m a bit worried.
M: Why should you? What’ s going on?
W: You know...what I chose to talk about is British history.
M: Really? That is a big topic.
W: Yes. There are so many things to cover. I just can’ t see how to do it in a three-minute speech.