You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Anna Hall.

ASSISTANT: How can I assist you?

USER: I am planning to visit Crissy field at Detroit, can you please help me with booking a flight ticket?

ASSISTANT: Anna Hall, please share your airport codes with me for booking?

USER: My origin airport code is EWR and the destination airport code is DTW.

ASSISTANT: May I know your planned dates for this journey?

USER: Sure, I would like to take off on 08/27 and return back on 08/29.

ASSISTANT: Give me a moment for checking please.

USER: Sure.

ASSISTANT: No flights found on your requested dates, sorry for the inconivence.

USER: Ok, no problem.I will try another way to complete my trip. Anyways, thank you for checking.

ASSISTANT: Have a great day.

USER: Thank you.