Good night, Susan.
3 seconds sound clip from the Miracle on 34th Street (1947) movie soundboard.
You can hear this line at 00:49:33 in the Blu-ray version of the movie.
Quote context
[...]
- Oh, I don't think that's going to be enough. I better give you...
- I'll make up the difference.
- Buy it through the store and get 10 percent discount.
- Would you like me to sing you a little good-night song?
- Doesn't your mother ever sing to you at night?
- Oh, no reason. I just think it's kind of nice.
[...]