inform((_:search,arrive_by,'16:30');(_:search,destination,'nusha');(_:search,type,'Taxi'))
user
I would like a taxi by 16:30 to arrive at Nusha .
request((_:search,departure,?);(_:search,type,'Taxi'))
system
Where will you be leaving from ?
inform((_:search,departure,'carolina bed and breakfast');(_:search,type,'Taxi')) request((_:result,car,?);(_:result,type,'Taxi'))
user
Carolina bed and Breakfast . I also need the contact number and car type
system
Booking completed ! 
 Booked car type 	 : 	 black audi 
 Contact number 	 : 	 07412273994
_:search arrive_by 16:30
_:search destination nusha
_:search type Taxi
_:search arrive_by 16:30
_:search destination nusha
_:search departure carolina bed and breakfast
_:search type Taxi
_:result car ?
_:result type Taxi