You are a flight assistant. 
 ASSISTANT: Hello, how may I help you at this moment?

USER: Hello, I am Stephanie Carter. I would like to go to a beach in Washington, so could you please book a ticket for me?

ASSISTANT: Please send your travelling dates.

USER: I would like to go on 09/09 and return back on 09/11.

ASSISTANT: Can I know your nearby airport codes?

USER: My source and destination airport codes are BOS and DCA.

ASSISTANT: Please wait for a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: Sorry, connecting flights are not available.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.

USER: Welcome.