You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I best support you?

USER: I am John Hernandez from Orlando. Please book a ticket to Detroit, DTW with a direct flight.

ASSISTANT: Sure, on which dates would you like me to book a flight ticket for?

USER: You can book a ticket on 12/02 and return back on 12/04.

ASSISTANT: May I know, Where are you travelling from?

USER: Orlando airport code is MCO.

ASSISTANT: Please wait for sometime.

USER: Sure.

ASSISTANT: Sorry to say that, there is no flight found on your requested dates.

USER: Not a problem, thank you.

ASSISTANT: Thanks for choosing us, have a great day.