inform((_:search,type,'Taxi'))
user
Can you help me book a taxi please ?
request((_:search,departure,?);(_:search,type,'Taxi'))
system
Yes what is your departure site ?
inform((_:search,departure,"sheep 's green and lammas land park fen causeway");(_:search,type,'Taxi'))
user
I am departing from sheep 's green and lammas land park fen causeway .
system
What time do you want to leave ?
_:search type Taxi
_:search departure sheep 's green and lammas land park fen causeway
_:search type Taxi