Find me an expensive restaurant that serves gastropub food
I see several options; do you prefer the centre or east of town?
The centre of town.
Backstreet Bistro and The Slug and Lettuce are both expensive gastropub restaurant in the centre of town.
I need a reservation for any of those. 16:00, on Tuesday for 8 people.
You're booked at Backstreet Bistro, ref #O8Z7DXNU. Can I help you with anything else?
No thank you, that will be everything.  
Have a good day and enjoy your visit.