Oh, you are sweet.
5 seconds sound clip from the Swiss Miss (1938) movie soundboard.
You can hear this line at 00:51:53 in the DVD version of the movie.
Quote context
[...]
- You're so sweet. And I never thanked you for helping me getting into this hotel.
- It was a mere nothing combined with a terrific pleasure.
- I'd say I would. The prettiest peasant girl I have ever seen.
- In what?
- Am I?
- It's easy. Look at the silly, sloppy look on your face. Look at it.
- Do you mind if I tell you something else? She's in love with you, too.
[...]