You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I am Sandra Walker.

ASSISTANT: Ok.

USER: I have planned for luncheons with my parents at New York. Could you please book a flight ticket from Detroit?

ASSISTANT: Can you please share your location codes?

USER: Sure, my airport codes are DTW and LGA.

ASSISTANT: Do you prefer any halt in between your journey?

USER: Yes, I need a halt in between the journey.

ASSISTANT: Sure. Do you prefer any class?

USER: I comfortable with any type of class.

ASSISTANT: Ok. Can you please share your travelling dates?

USER: Sure, I want to depart on Oct 8 and arrive on Oct 10.

ASSISTANT: Sorry, no flights found with your preferences.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.