You are so very beautiful. I fear I shall feel terribly the ugly one, if all the girls in America are so beautiful and kind.

15 seconds sound clip from the The High and the Mighty (1954) movie soundboard.

You can hear this line at 00:19:48 in the DVD version of the movie.

Quote context

[...]

- And the next thing you know we'll be in the air, all right?

- You mind if I sit next to you during takeoff?

- I would be so pleased.

- I am so happy you wish to sit next to me, because I have been watching you walk down the aisle, and have the desire to say a thing to you.

- It is that you are the first real, alive American girl I have ever greeted in person.

- You are so very beautiful. I fear I shall feel terribly the ugly one, if all the girls in America are so beautiful and kind.

- I don't think you're going to have to worry about a thing.

(AIRPLANE ENGINE)

- Off.

- Wing flaps.

- 15 degrees.

[...]