johnny deep
It is called a 'cue'. It is the last line of the preceding actor.
No they say it interferes with the signal on the plane or something.
The word you are looking for is "cue"
Steven Butler
The signal for an actor to do or say something is typically given by the director or stage manager. This signal can be a verbal cue, a specific gesture, or a pre-arranged cue within the script. It is important for actors to be attentive and responsive to these signals to ensure smooth performance.
Janet gaynor
Johny Depp
Hugo Weaving
Bill Murray
Yes. Keep The Dream Alive!
to signal the coming of something