inform((_:search,departure,'stansted airport');(_:search,type,'Train'))
user
Hey . I 'm looking for a train from stansted airport .
request((_:search,day,?);(_:search,type,'Train'))
system
What day will you be traveling ?
inform((_:search,day,'tuesday');(_:search,type,'Train'))
user
I plan to go on tuesday .
request((_:search,destination,?);(_:search,type,'Train'))
system
What is your destination ?
inform((_:search,destination,'cambridge');(_:search,type,'Train'))
user
My destination is cambridge .
inform((_:result,amount,'several');(_:result,type,'Train')) request((_:search,leave_at,?);(_:search,type,'Train'))
system
There are several .   Do you have a time you need to travel specifically ?
inform((_:search,arrive_by,'10:00');(_:search,type,'Train'))
user
The train should arrive by 10:00 if at all possible .
inform((_:result,leave_at,'every hour');(_:result,type,'Train')) offer((_:booking,arrive_by,'8:52');(_:booking,category,'Train');(_:booking,id,'TR5077');(_:booking,type,'Booking'))
system
There are trains departing every hour .   TR5077 would get in in at 8:52 , does that work for you ?
request((_:result,ref,?);(_:result,type,'Train'))
user
That sounds perfect . Can I get the reference number from the booking ?
request((_:search,people,?);(_:search,type,'Train'))
system
How many tickets would you like ?
inform((_:search,people,'4');(_:search,type,'Train'))
user
I would like 4 tickets .
system
Booking was successful , the total fee is 40.4 GBP payable at the station . Reference number is : WWW231NO . Is there anything else you need ?
_:search departure stansted airport
_:search type Train
_:search departure stansted airport
_:search day tuesday
_:search type Train
_:search departure stansted airport
_:search day tuesday
_:search destination cambridge
_:search type Train
_:search departure stansted airport
_:search day tuesday
_:search destination cambridge
_:result amount several
_:result type Train
_:search leave_at ?
_:search arrive_by 10:00
_:search type Train
_:search departure stansted airport
_:search day tuesday
_:search destination cambridge
_:result amount several
_:search leave_at ?
_:search arrive_by 10:00
_:search type Train
_:result leave_at every hour
_:result type Train
_:system offered _:booking
_:booking arrive_by 8:52
_:booking category Train
_:booking id TR5077
_:booking type Booking
_:result ref ?
_:search departure stansted airport
_:search day tuesday
_:search destination cambridge
_:result amount several
_:search leave_at ?
_:search arrive_by 10:00
_:result leave_at every hour
_:result type Train
_:system offered _:booking
_:booking arrive_by 8:52
_:booking category Train
_:booking id TR5077
_:booking type Booking
_:result ref ?
_:search people 4
_:search type Train