inform((_:search,food,'sri lankan');(_:search,pricerange,'expensive');(_:search,type,'Restaurant'))
user
I 'm looking for an expensive Sri Lankan restaurant .
request((_:search,food,?);(_:search,type,'Restaurant')) canthelp((_:search,food,'Sri Lankan');(_:search,type,'Restaurant'))
system
There are no Sri Lankan restaurants available . Would you like to try searching for a different type of cuisine ?
inform((_:search,food,'british');(_:search,type,'Restaurant'))
user
How about british food instead ?
request((_:search,area,?);(_:search,type,'Restaurant'))
system
Which side of town would you prefer ?
user
The side of town is n't important to me , as long as it is on the pricey side .
system
The Oak Bistro is a nice place would you like to try that one ?
_:search food sri lankan
_:search pricerange expensive
_:search type Restaurant
_:search pricerange expensive
_:system canthelp _:search/378fe9d1
_:search/378fe9d1 food Sri Lankan
_:search/378fe9d1 type Restaurant
_:search food british
_:search type Restaurant
_:search pricerange expensive
_:system canthelp _:search/378fe9d1
_:search/378fe9d1 food Sri Lankan
_:search/378fe9d1 type Restaurant
_:search food british
_:search area ?
_:search type Restaurant