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: I’d like to have a copy of Professor Franklin’s book on English Dialects.
W: I’m sorry, Sir. That book has been out of stock for some time now.