Do you have any availability on...?

Meaning

Inquiring about the availability of reservations.

Examples

• John: Hello, I'd like to make a reservation.
• Alice: Certainly, what date and time are you looking for?
• John: <b>Do you have any availability on</b> Saturday evening?
• Alice: Let me check... Yes, we have a few tables available. <b>Do you have any availability on</b> the 25th?