You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I need to book a direct flight reservation for my holiday trip from New York to Detroit, can you help me?

ASSISTANT: Sure, help me with the travelling dates.

USER: I will be travelling on 08/21 and I would like to return on 08/23.

ASSISTANT: May I know your flying and landing airport codes?

USER: My airport codes for this journey will be from JFK to DTW.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Sorry, there is no direct flight on your requested dates. May I know your name?

USER: Myself Amy Collins. Sad to know about it, thank you for checking.

ASSISTANT: Thank you for choosing us.