Some fun with a pun:
So It’s Friday night and your friends have invited you out for the evening. You however would rather stay home and enjoy the new book that you just purchased.
What do you then say to your friends?
Your response: “I’m sorry I can’t make it but my evening is fully booked. We’ll have to do it another time when my day isn’t all booked up.”
For more punny conversations: Punniest Book