Restaurant Bookings Of Future Past

I am taking bookings for our restaurant. It is currently late June.

Customer: “I want to book your terrace for an event in September, but it needs to be sunny!”

Me: “Well, we can certainly make a reservation for you, but we can’t guarantee good weather.”

Customer: “Then who can?”

Me: “Sorry, ma’am, but you’d have to talk to someone from the future to find out.”

Customer: “Well, can you call them?”

Me: “Uh… no?”

Customer: “So lazy! Fine! Give me their number; I’ll call them!”