Task-oriented dialogue about: restaurant

I'm looking for a cheap restaurant that serves world food?
Unfortunately there are now restaurants that meet those specifications. Would you like me to look for a different kind of food?
The restaurant should be in the north.
The only restaurants in the north serve Asian Oriental, Chinese, European, French, Indian or Italian food. Would you like to change to one of those?
Tell me about the Indian restaurants in the north then please?
There are two Indian restaurants, the nirala and royal spice. The royal spice is in the cheap range and the nirala is in the moderate price range.
Can you book me a table for two at the Royal Spice?
What day would you like this reservation to be available for?
I need a booking for 2 people at 17:30 on tuesday.
Booking was unsuccessful. Would you like to find another restaurant?
Yes. Can you look for something in the same area and price range please?
I can get a table for you at da vinci pizzeria. This is the only other place to eat in that area. Reference number is W6MFU6XD .
That is perfect. Thank you for all the help!
Thank you for using our system!