You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Can you please help me in booking the ticket from Washington to Boston?

ASSISTANT: Sure, can you please provide your travelling dates?

USER: Sure, I want to depart from here on 02/10 and return from there by 02/12.

ASSISTANT: May I know your nearest airport codes of travelling please?

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

ASSISTANT: Please wait a moment.

USER: Sure, search for a direct flight.

ASSISTANT: There are no flights available on this route with direct connecting flight.

USER: That's ok, thank you for giving the information.

ASSISTANT: Can you please provide your good name for documentation purpose.

USER: Yes, my name is Karen White.

ASSISTANT: Thank you for contacting us.