It's not good, but it's a reason.
3 seconds sound clip from the White Christmas (1954) movie soundboard.
You can hear this line at 00:32:07 in the Blu-ray version of the movie.
Quote context
[...]
- Let me ask you something. Why don't we pay the fellow the $200?
- Are you kidding? Pay off a chiseling rat like that?
- Will you send a cab out back, and I'll meet you in the dressing room?
- I don't know how I get mixed up in these things. Why do I listen to you? Give me one good reason.
- Let's just say we're doing it for an old pal in the Army.
- It's not good, but it's a reason.
- You kids get down to the station and hop on a train.
- We can't. Our tickets aren't good until tomorrow.
- But you've got to get out tonight.
- Tickets. Wait a minute. Here, take these. Now, get going. Come on.
[...]