You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am Barbara Wright. I would like to travel to Washington, can you please help me to reserve a flight ticket from New York?

ASSISTANT: Sure, I am here to help you with that flight ticket booking. Can you please provide your preferable airport codes?

USER: Thank you. My preferable airport codes are LGA and DCA.

ASSISTANT: May I know your respective travelling dates, please?

USER: The travelling dates are 09/08 and 09/10.

ASSISTANT: Sorry to tell you that, there are no flights available on your route as per your travel dates.

USER: It's ok, thank you for searching the flights.

ASSISTANT: Thank you for contacting us, have a great day.