inform((_:search,departure,'rajmahal');(_:search,leave_at,'22:30');(_:search,type,'Taxi'))
user
Please book me a taxi to come to Rajmahal by 22:30 .
request((_:search,departure,?);(_:search,type,'Taxi'))
system
Sure ! Where are you coming from ?
inform((_:search,departure,'Rajmahal');(_:search,type,'Taxi'))
user
I want to depart from Rajmahal , not go to there .
request((_:search,destination,?);(_:search,type,'Taxi'))
system
Ok , what is your destination ?
inform((_:search,destination,'restaurant two two');(_:search,type,'Taxi'))
user
I 'll be heading to restaurant two two
system
Booking completed ! 
 Booked car type 	 : 	 black toyota 
 Contact number 	 : 	 07452807807
_:search departure rajmahal
_:search leave_at 22:30
_:search type Taxi
_:search leave_at 22:30
_:search departure Rajmahal
_:search type Taxi
_:search leave_at 22:30
_:search departure Rajmahal
_:search destination restaurant two two
_:search type Taxi