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? The author.

The author who? The author who's running out of names for these jokes.

Knock knock. Who's there? Hugh.

Hugh who? Hugh-man, I've got a 'Hugh'-ge request: can you 'Hugh'-mor me by letting me in? Because this joke is so pun-tastic, you'll 'Hugh'-rry to tell all your friends, and they'll 'Hugh'-ge-ly regret not being here to 'Hugh'-ear it first!

Knock knock. Who's there? This is a knock-knock joke.

This is a knock-knock joke who? Just trying to figure out where we go from here.