It so happens that I do not know who you are, my good fellow.
6 seconds sound clip from the Ocean's 11 (1960) movie soundboard.
You can hear this line at 01:26:09 in the Blu-ray version of the movie.
Quote context
[...]
- You're wasting your time with that Clyde, honey. He's a loser. He's a loser!
- I'm so drunk, I don't think I could lie down without holding on.
- Here you are, Missy. Happy New Year to you!
- It so happens that I do not know who you are, my good fellow.
- Now, who do I have to be to wish you a Happy New Year?
- I used to be Ricky Nelson. I'm Perry Como now. Come on.
- Smart girl. Now, about this night air. Let's get in out of it. Come on.
- Too close for comfort. Come on.
- No. I hate it, too. I hate holidays. Do you like holidays?
[...]