There's no one here. Please help yourself to brandy and be seated.

5 seconds sound clip from the Clue (1985) movie soundboard.

You can hear this line at 00:17:13.916 in the Blu-ray version of the movie.

Quote context

[...]

- No, thanks, Yvette. I just ate.

- Now how did you know her name?

- We know each other. Don't we, dear?

- Forgive my curiosity, Mr. Boddy, but did your letter say the same thing?

- No.

- I see.

- Can I interest any of you in fruit or dessert?

- In that case, may I suggest we adjourn to the study for coffee and brandy, at which point I believe our unknown host will reveal his intentions.

- There's no one here. Please help yourself to brandy and be seated.

- Mind if I smoke?

- Ladies and gentlemen, I'm instructed to explain to you what you all have in common with each other. Unless you would care to do the honors, Mr. Boddy?

- Why me? Do they know who I am?

- I don't think so. You've never identified yourself to them, I believe.

- It's a hoax. I suggest we all leave.

[...]