inform((_:search,food,'vietnamese');(_:search,pricerange,'cheap');(_:search,type,'Restaurant'))
user
Find me a cheap vietnamese food place please .
offer((_:booking,type,'Booking')) inform((_:result,name,'thanh binh');(_:result,type,'Restaurant'))
system
We have thanh binh .   Would you like a reservation ?
inform((_:search,day,'thursday');(_:search,duration,'15:00');(_:search,people,'8');(_:search,type,'Restaurant'))
user
Yes , please book a table for 8 on Thursday at 15:00 .
inform((_:booking,ref,'LAKQV5EK');(_:booking,type,'Booking'))
system
Booking was successful . The table will be reserved for 15 minutes . 
 Reference number is : LAKQV5EK .
inform((_:search,day,'friday');(_:search,type,'Train'))
user
I also need a Friday train .
request((_:search,departure,?);(_:search,destination,?);(_:search,type,'Train'))
system
OK , from where to where do you need a train ?
inform((_:search,departure,'cambridge');(_:search,destination,'birmingham new street');(_:search,type,'Train'))
user
I am departing from Cambridge and going to Birmingham New Street .
inform((_:result,count,'19');(_:result,type,'Train')) request((_:search,arrive_by,?);(_:search,leave_at,?);(_:search,type,'Train'))
system
There are 19 trains . Do you have a preferred time to leave or arrive by ?
inform((_:search,arrive_by,'21:15');(_:search,destination,'birmingham new street');(_:search,type,'Train'))
user
I want to arrive at Birmingham new street by 21:15 , please .
inform((_:result,count,'15');(_:result,type,'Train')) offer((_:booking,category,'Train');(_:booking,type,'Booking'))
system
There are 15 possible options . Do you want me to reserve some tickets for you ?
inform((_:search,people,'8');(_:search,type,'Train')) request((_:result,ref,?);(_:result,type,'Train'))
user
Yes please pick the last option and book 8 tickets for me . I will definitely need the reference number too .
inform((_:booking,category,'Train');(_:booking,ref,'Z277D99H');(_:booking,type,'Booking'))
system
Your booking was successful . The reference number is Z277D99H .
thank()
user
Great . Thank you for all your help .
system
You are welcome , let us know if we can help with anything else .
_:search food vietnamese
_:search pricerange cheap
_:search type Restaurant
_:search food vietnamese
_:search pricerange cheap
_:system offered _:booking
_:booking type Booking
_:result name thanh binh
_:result type Restaurant
_:search day thursday
_:search duration 15:00
_:search people 8
_:search type Restaurant
_:search food vietnamese
_:search pricerange cheap
_:system offered _:booking
_:result name thanh binh
_:result type Restaurant
_:search duration 15:00
_:search people 8
_:booking ref LAKQV5EK
_:booking type Booking
_:search day friday
_:search type Train
_:search food vietnamese
_:search pricerange cheap
_:system offered _:booking
_:result name thanh binh
_:result type Restaurant
_:search duration 15:00
_:search people 8
_:booking ref LAKQV5EK
_:booking type Booking
_:search day friday
_:search departure cambridge
_:search destination birmingham new street
_:search type Train
_:search food vietnamese
_:search pricerange cheap
_:system offered _:booking
_:result name thanh binh
_:search duration 15:00
_:search people 8
_:booking ref LAKQV5EK
_:booking type Booking
_:search day friday
_:search departure cambridge
_:result count 19
_:result type Train
_:search leave_at ?
_:search arrive_by 21:15
_:search destination birmingham new street
_:search type Train
_:search food vietnamese
_:search pricerange cheap
_:system offered _:booking
_:result name thanh binh
_:search duration 15:00
_:booking ref LAKQV5EK
_:booking type Booking
_:search day friday
_:search departure cambridge
_:search leave_at ?
_:search arrive_by 21:15
_:search destination birmingham new street
_:result count 15
_:result type Train
_:booking category Train
_:search people 8
_:search type Train
_:result ref ?
_:search food vietnamese
_:search pricerange cheap
_:system offered _:booking
_:result name thanh binh
_:search duration 15:00
_:search day friday
_:search departure cambridge
_:search leave_at ?
_:search arrive_by 21:15
_:search destination birmingham new street
_:result count 15
_:result type Train
_:search people 8
_:search type Train
_:result ref ?
_:booking category Train
_:booking ref Z277D99H
_:booking type Booking