User: I need tickets for a movie tonight
Assistant: what theater
User: the lux
Assistant: what movie
User: star wars
Assistant: what showtime
User: 7:00 PM
Assistant: number of tickets
User: 2 please
Assistant: any screen preference
User: 3d
Assistant: anything else
User: wait do they have it on imax
Assistant: yes they do
User: change the tickets for imax
Assistant: would you like me to confirm