Yes I would like to find a restaurant that is in the cheap price range on the west side of town.
Would you prefer italian or vietnamese food?
Italian. Would you reserve a table for 5 for me? I'd like that to be at 14:00 on Tuesday.
Booking was unsuccessful for la margherita. Would you like me to try booking for the Vietnamese restaurant called thanh binh?
Sure, let's do that. 
I reserved a table for you at Thanh Binh.  The reference number is XX1TF9GV.  Is there anything else I can help you with?
No thanks for all your help
You're welcome! Have a great day!