He's Nick Charles, a well-known private detective, played by William Powell. And he's waiting for his charming wife Nora, played by Myrna Loy.
10 seconds sound clip from the The Thin Man (1936) classic radio play.
You can hear this line at 00:03:53 in the radio play.
Quote context
[...]
- We're in a fashionable café, The Montmartre, in New York City.
- It's Christmas Eve and the well-appointed dining room is filling rapidly.
- From the bar comes a good-looking young fellow of about thirty-five. Tall casual and worldly-wise...
- I beg your pardon, aren't you Mr. Nick Charles? The detective?
- I am. Yes, I'm Nick Charles.
- I thought I recognized you. My name is Dorothy Wynant.
- Do you mind if I sit down for awhile?
- No, but I expect my wife in a few minutes if you don't mind explaining your presence to her.
- Of course! That's my fiancé over there at the other table.
[...]