Knock knock. Who's there? Pane

Pane who? I'm having a glass-half-empty relationship with you, it's a window of opportunity to change.

Knock knock. Who's there? Dave.

Dave who? I don't know, *you're* the one who's supposed to open the door.

Knock knock. Who's there? Next question.

Next question who? Next question... oh, this isn't an interview!

Knock knock. Who's there? You tell me.

You tell me who? No, *you* tell *me* who's there. I'm the one knocking, how should I know who's inside?