You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Scott Green here.

ASSISTANT: How may I help you today?

USER: Can you book a flight ticket for my airport codes that is from DFW to DTW?

ASSISTANT: Ok, I am happy to help you with that. Can I know your planned trip dates?

USER: The trip dates are from Jan 22 to Jan 24.

ASSISTANT: May I know your depart and return timings?

USER: That does not matter.

ASSISTANT: Please wait for a minute. Sorry to say that, there are no flights available based on your travelling dates.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for reaching us.