- Oh, I must have mislaid it. I'd better go and find it, though.
- Try looking in your hand.

5 seconds sound clip from the Meet Me in St. Louis (1944) movie soundboard.

You can hear this line at 01:31:33.571 in the DVD version of the movie.

Quote context

[...]

- I'm so thrilled about you coming to New York. I want you to promise to let me give you your first party. You will, won't you?

- Esther, the plans have been changed.

- Lucille suggested that Lon and she pair off tonight and Warren and me.

- The plans have been changed.

- Oh.

- What's this about Miss Ballard's dance card?

- Oh, I must have mislaid it. I'd better go and find it, though.

- Try looking in your hand.

- Clinton Badger? Hugo Boorvis? Sidney Gorcey?

- How about a dance? Well, if you're on my card. May I have my card, please?

- Is this Miss Ballard's card?

- Well, let me see. Oh, no. I made a mistake and put your name on my card. That's yours.

- Thank you.

- This is mine.

[...]