You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Kathleen Anderson here.

ASSISTANT: How may I aid you today?

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

ASSISTANT: Sure, could you please share me with your dates of journey?

USER: The travel dates are from Feb 18 to Feb 20.

ASSISTANT: May I know your good name please?

USER: I am Kathleen Anderson.

ASSISTANT: Do you need any other help from my side please?

USER: I prefer a stopover flight.

ASSISTANT: Ok, please wait for a mean while.

USER: Sure.

ASSISTANT: Sorry Anderson, there is no flight found as per your travelling details.

USER: Not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.