I would be more likely to hear a conversation like this in my town. I'm filling in for John but this is what I would generally expect to hear from the operator. (hearing directly from a restaurant owner is not typical but possible in smaller restaurants).
Operator: Planet Delicious, this is Max. How can I help you?
John: Hi. I want to book a table please.
Owner: When?
John: This Saturday.
Owner: We got 6, 7, 7:30, or 8.
John: 7.30 please.
Owner: How many people?
John: Six.
Owner: Can I take your name?
John: Jerry.
Owner: I got you down. Anything else?
John: No. Thanks. Bye.