Airplane (1980) still makes me laugh:
Roger Murdock: Flight 2-0-9'er, you are cleared for take-off.
Captain Oveur: Roger!
Roger Murdock: Huh?
Tower voice: L.A. departure frequency, 123 point 9'er.
Captain Oveur: Roger!
Roger Murdock: Huh?
Victor Basta: Request vector, over.
Captain Oveur: What?
Tower voice: Flight 2-0-9'er cleared for vector 324.
Roger Murdock: We have clearance, Clarence.
Captain Oveur: Roger, Roger. What's our vector, Victor?
Tower voice: Tower's radio clearance, over!
Captain Oveur: That's Clarence Oveur. Over.
Tower voice: Over.
Captain Oveur: Roger.
Roger Murdock: Huh?
Tower voice: Roger, over!
Roger Murdock: What?
Captain Oveur: Huh?
Victor Basta: Who?
and
[as the plane prepares to take off]
Hanging Lady: Nervous?
Ted Striker: Yes.
Hanging Lady: First time?
Ted Striker: No, I've been nervous lots of times.
plus
Elaine Dickinson: You got a letter from headquarters this morning.
Ted Striker: What is it?
Elaine Dickinson: It's a big building where generals meet, but that's not important.
Last one:
Ted Striker: My orders came through. My squadron ships out tomorrow. We're bombing the storage depots at Daiquiri at 1800 hours. We're coming in from the north, below their radar.
Elaine Dickinson: When will you be back?
Ted Striker: I can't tell you that. It's classified.