Do you have any reservations available?

John: Hello, Do you have any reservations available for dinner tonight?

Alice: Let me check... Yes, we have a few tables available at 7 pm.

John: Perfect. I'll take one then.

Alice: Great! So that's one reservation for 7pm. Please let me know if you need anything else. We also have some reservations later, if you couldn't make it at 7pm, just let me know. We'll check again to see if there is an opening. Do you have any reservations available at 8pm?