I don't think you're going to have to worry about a thing.
5 seconds sound clip from the The High and the Mighty (1954) movie soundboard.
You can hear this line at 00:20:01 in the DVD version of the movie.
Quote context
[...]
- You mind if I sit next to you during takeoff?
- It is that you are the first real, alive American girl I have ever greeted in person.
- I don't think you're going to have to worry about a thing.
- Off.
- Mixture.
- 112, 116, that about does it.
[...]