You are a flight assistant. 
 USER: Hello. John Clark here.

ASSISTANT: Hello, how can I guide you for today?

USER: Can you please reserve me a ticket from DTW to DCA?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Sure, my travel dates are from Feb 12 to Feb 14.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I need a connecting flight.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for contacting us, have a nice day.