"Knock Knock - Justin" joke

Knock Knock
Who's there!
Justin!
Justin who?
Justin Casey howls, give him his bottle! Knock Knock
Who's there!
Justin!
Justin who?
Justin Quire who is at the door! Knock Knock
Who's there!
Justin!
Justin who?
Justin time for dinner! Knock Knock
Who's there!
Justin!
Justin who?
Justin time for tea!