What are the two speakers talking about?

M: What kind of dress are you looking for?
W: Since it’s getting warmer and warmer, I’d like something light. What do you think would be the best?

M: Good morning. Mary, how’s it going?
W: Pretty good, Bill. How about you?
M: Oh, I’m OK. How is that English class you’re teaching?
W: It’s going really well. I have a great class this year. I’ve got 30 students.
M: That’s good. I love to teach English. I’m only teaching history now.