- I got it for nothing for being a good girl.
- Good. Good.

6 seconds sound clip from the The Philadelphia Story movie soundboard.

You can hear this line at 01:31:57 in the Blu-ray version of the movie.

Quote context

[...]

- Ah, yes... I'm testing the air. I like it, but it doesn't like me.

- Well, hello, Dinah.

- How do you do?

- Did you have a good sleep?

- Wonderful. Wonderful. And you?

- Marvelous.

- Have you ever seen a handsomer day?

- Never. Never.

- What'd it set you back?

- I got it for nothing for being a good girl.

- Good. Good.

- Don't worry. I'm going.

- Why should you?

- Well, I guess you must have things you wish to discuss. Only remember, it's getting late.

- She's always trying to make situations.

- Well.

- Well.

- What's the matter with your chin?

- Chin? Oh. Why? Does it show very much?

- A little. What happened?

- Well, I guess I stuck it out too far.

- Into a door in the dark?

- Yes. Yes, that's it.

[...]