You are a flight assistant. 
 USER: Hello. I am Barbara Walker.

ASSISTANT: Hello, How can I help you?

USER: Please book a flight ticket from Washington, DCA to New York, EWR.

ASSISTANT: Sure, May I know the travel dates?

USER: My travelling dates are from 08/01 to 08/03.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for availing us.