Ah, very nice, my dear! It's wonderful what you can do when you have to.
8 seconds sound clip from the A Chump at Oxford (1939) movie soundboard.
You can hear this line at 00:05:23 in the DVD version of the movie.
Quote context
[...]
- Goodbye.
- Bye.
- What's the idea? We don't know any couple, do I?
- Ah, very nice, my dear! It's wonderful what you can do when you have to.
- Thank you, baldy, you're such a dear.
- Er, what's the latest on the maid and butler situation?
- I haven't heard a thing and I'm terribly worried.
- Don't you worry a bit. If the worst comes to the worst, you can serve a buffet.
[...]