Hello, please find me a place to dine in the north area that serves polish food.
There are no restaurants that meet that criteria. Would you like me to look for Polish food in another area?
Yes please. I would just need it to be in the cheap price range.
I do not have any polish restaurants in the cheap price range. Would you like a different restaurant or cuisine? 
Yes, let's try italian food.
Great.  Da vinci pizzeria is a cheap italian restaurant in the north.  Would you like me to make a reservation there?
Book a table for 1 person at 16:00 on Saturday.
I'm sorry the booking was unsuccessful. Would you like me to try another cuisine or different area?
I'd like a restaurant in the same area and price range. It doesn't matter what cuisine.
Booking was successful at royal spice. The table will be reserved for 15 minutes. Reference number is : KEJQJLSS.
Thank you, that was all I needed. 
You're welcome. Good-bye.