What has happened?

M: You look depressed. What’s eating you up?
W: Our dog. He’s missing these three weeks.
M: Oh. I know how you feel. There’s not so much we can do about it . Why don’t you put an ad in the paper?

M: These steel chairs are on sale for $ 85 each or $ 150 for a pair. How many would you like to have?
W: Let me have a look. Oh, good! I think I’d like to have two.