- Father, this is Mr. Case.
- How do you do, Mr. Case?
- How do you do, sir?

3 seconds sound clip from the Holiday (1938) movie soundboard.

You can hear this line at 00:32:11.581 in the Blu-ray version of the movie.

Quote context

[...]

- You will all excuse yourselves on one pretext or another.

- Keep a stiff upper lip, Father. No doubt the fellow is an impostor.

- Father.

- Yes, Julia?

- Remember... I know what I want.

- Come in, Johnny.

- Oh. Hope I'm not late. I got caught in a traffic jam.

- Father, this is Mr. Case.

- How do you do, Mr. Case?

- How do you do, sir?

- My daughter Linda.

- How do you do?

- How do you do?

- My son Edward.

- How do you do?

- How do you do?

- Oh, Ned, if you and your sisters will do the telephoning you spoke about, I shall try and entertain Mr. Case.

- We'll be back in a few minutes, Johnny.

[...]