You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Angela Jackson here.

ASSISTANT: How may I assist you today Angela?

USER: I would like to fly on 09/15 from Washington. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I will help you with that. Could you please provide your nearest airport codes for booking?

USER: My airport codes are from DC-DCA to NY-EWR.

ASSISTANT: Ok, may I know your return date to proceed further?

USER: My return date is 09/17.

ASSISTANT: Please hold on a moment.

USER: Ok, take your time.

ASSISTANT: Sorry to inform you that, there are no flights found in your travel locations with your requested dates of travelling.

USER: Thank you for the information.

ASSISTANT: Thank you for using our services, have a great day.