- Here, it will be cold on that train.
- I shall be all right.
- You send me a wire as soon as you arrive.

4 seconds sound clip from the The Third Man (1949) movie soundboard.

You can hear this line at 01:24:59.425 in the Blu-ray version of the movie.

Quote context

[...]

- How did you know I would be here?

- I heard something about it at police headquarters.

- Have you been seeing Major Calloway again?

- Of course not. I don't live in his pocket.

- Harry, what is it?

- For heaven's sake, stop calling me Harry.

- I'm sorry.

- What is on your mind? Why did you hide here?

- Hide? Can't a fellow have a drink?

- Here, it will be cold on that train.

- I shall be all right.

- You send me a wire as soon as you arrive.

- What's going to happen? Where is Harry?

- He's safe in the Russian zone.

- How do you know?

- Oh, I saw him today.

- How is he?

- He can look after himself, don't worry.

- Did he say anything about me? Tell me.

- Oh, the usual things.

- There's something wrong. Did you tell Calloway about meeting Harry?

- Of course I didn't tell Calloway.

[...]