I'm looking for a place to dine. The restaurant should be in the centre and should serve mediterranean food.
The Gardenia restaurant is a great choice. It is not expensive, and meets your other criteria. The address is 2 Rose Crescent City Centre
Sounds great!  Can you help me book a reservation for 4 people on Sunday? 
What time would you like the reservation to be for?
16:15, please, thank you.
You are booked, with ref # WBB6XXRP. Anything else for you today?
No that is all. Thank you for the help.
You're welcome and thanks for using our help desk. Goodbye.