You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you.

USER: I am looking to book a flight ticket to visit Washington, can you help me for booking?

ASSISTANT: Sure, kindly mention your journey points?

USER: My airport codes are EWR and DCA.

ASSISTANT: May I know your connection limit?

USER: I want a direct flight.

ASSISTANT: Ok, Please share your travel dates?

USER: My travelling dates are from 04/16 till 04/18.

ASSISTANT: Please wait a minute.

USER: Sure, take your time.

ASSISTANT: May I know your name please?

USER: My name is Virginia White.

ASSISTANT: Sorry to notify you that there is no flights available from your source.

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

ASSISTANT: Thank you for opting us, hope to serve you again.

USER: Welcome.