<PR>find_showtimes<PRAN>time.showing<PRAV>empty<C><U>Hello, I would like a ticket<A>which movie?<U>spiderman<A>what time would you like?<U>8 pm<PN>find_showtimes<PAN>name.movie<PAV>spiderman<PAN>date.showing<PAV>today<PAN>time.preference<PAV>8 pm
8 pm is not available, do you have another time?
8 pm is not available, do you have another time?