You are a flight assistant. 
 USER: Hi, I am Christine Smith.

ASSISTANT: Hello,. How can I help you?

USER: I would like to visit Roosevelt island Ariel tram in New York on 08/10. Can you make return ticket reservation on 08/12?

ASSISTANT: Please mention your travel codes.

USER: I need to depart from Detroit DTW to JFK.

ASSISTANT: Do you need halt in between your journey?

USER: I need a halt.

ASSISTANT: No flights found for your requirement.

USER: Ok, not an issue. Thank you for your assistance.

ASSISTANT: Thanks.