Phrases Phrases for Making Reservations

I have a reservation for [time].

Meaning

I have a pre-arranged booking for this time.

Translation language

John: Hi, I'm here for dinner.
Alice: May I have your name please?
John: Yes, it's John Smith. <b>I have a reservation for 7 pm</b>.
Alice: One moment please... Yes, John Smith, <b>I have a reservation for 7 pm</b> here.