Artificial intelligent assistant

What play are these lines a reference to? I am reading about an upcoming play that reimagines a meeting between Samuel Beckett and Harold Pinter on the cricket field. The play has references to their works. For instance, they both wait for a teammate named Doggo who might or might not be real - an obvious reference to Godot. The next line in the article states, "A car approaches. A man gets out, standing in silhouette, stage left. Pinter keeps hold of his bat, concealing it as a weapon. Beckett has slipped away." I am assuming that this is a reference to some Pinter play but am not sure which one. Any pointers are much appreciated.

Could it be a reference to the ending of _The Dumb Waiter_? In this play, Gus and Ben are hitmen partners; Gus leaves the room before their victim is due to arrive, Ben prepares his weapon for the assassination, and the door opens to reveal Gus.

> BEN: Gus!
>
> _He takes out a comb and combs his hair, adjusts his jacket to diminish the bulge of the revolver. The lavatory flushes off left. BEN goes quickly to the door, left._
>
> Gus!
>
> _The door right opens sharply, BEN turns, his revolver levelled at the door._
>
> _GUS stumbles in._
>
> _He is stripped of his jacket, waistcoat, tie, holster and revolver. He stops, body stooping, his arms at his sides. He raises his head and looks at BEN._

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