User: i need movie tickets
Assistant: what movie
User: 1917
Assistant: what time
User: 630 pm
Assistant: what screen
User: imax
Assistant: how many
User: 5
Assistant: ok looking for 5 tickets to 1917 at 630 pm with imax screen
User: change to 3d
Assistant: ok now looking for 5 tickets to 1917 at 630 pm with 3d
User: ok thanks
Assistant: found 5 tickets to 1917 at 630 pm with 3d
User: book it
Assistant: booked 5 tickets to 1917 at 630 pm with 3D