User: Purchase movie tickets.
Assistant: What movie would you like to see?
User: Bad Boys Forever.
Assistant: Is there are particular format that you would prefer to see the movie in.
User: What are my options?
Assistant: Your options are Standard digital, IMAX, Big D, Real 3D, or Dolby Digital.
User: Dolby Digital please.
Assistant: What time would you like to see Bad Boys Forever in Dolby Digital?
User: 9:50 PM.
Assistant: How many tickets should I purchase?