It wasn't important.
2 seconds sound clip from the The Third Man (1949) movie soundboard.
You can hear this line at 00:36:16.550 in the Blu-ray version of the movie.
Quote context
[...]
- You're wrong about Harry. You're wrong about everything.
- In one of his letters, he asked you to telephone a good friend of his called Joseph.
- He gave you the number of the Casanova Club.
- That's where a lot of friends of Lime used to go.
- Something about meeting Harry at his home.
- Harbin disappeared the day you telephoned.
- We've got to find him. You can help us.
- What can I tell you, but you've got everything upside down.
[...]