- Hey, so long.
- See you later!
- So long, mister!

4 seconds sound clip from the Who Framed Roger Rabbit movie soundboard.

You can hear this line at 00:10:44 in the Blu-ray version of the movie.

Quote context

[...]

(STREETCAR BELL RINGING)

- Wait for me! Come on! Guys, wait up!

- Come on, hurry up! Come on, Sig!

- Hurry up!

- Hey, mister, ain't you got a car?

- Who needs a car in L.A.? We got the best public transportation system in the world.

- Hey, so long.

- See you later!

- So long, mister!

- Thanks for the cigarettes.

- You bet.

- Anytime.

- Hi, Harry.

- Hey, Eddie. How's it going?

- Okay. What you got for me?

[...]