i am looking for an expensive restaurant in the centre .
user
there are 33 expensive restaurant -s in the centre of town . do you have a food preference ?
assistant
i would really love to find an expensive polish restaurant .
user
i am sorry but there are no expensive polish restaurant -s in the centre . would you like a different type of cuisine or price range ?
assistant
how about chinese food ?
user
we have ugly duckling , tang chinese , hk fusion , and sesame restaurant and bar . would you like to book 1 of those ?
assistant
can i have the phone number for the ugly duckling restaurant ?
user
there is no phone number for ugly duckling .
assistant
okay let s try the tang chinese . is there a phone number for them ?