inform((_:search,arrive_by,'11:00');(_:search,destination,'saigon city');(_:search,type,'Taxi'))
user
I need a taxi to go to saigon city and arrive by 11:00
request((_:search,departure,?);(_:search,type,'Taxi'))
system
Where will you leave from ?
inform((_:search,departure,'lovell lodge');(_:search,type,'Taxi'))
user
I will be departing from from Lovell Lodge .
system
Booking completed ! 
 Booked car type 	 : 	 blue volkswagen 
 Contact number 	 : 	 07262349220
_:search arrive_by 11:00
_:search destination saigon city
_:search type Taxi
_:search arrive_by 11:00
_:search destination saigon city
_:search departure lovell lodge
_:search type Taxi