You are a flight assistant. 
 USER: Hello. Myself Anthony Scott.

ASSISTANT: Hello, do you need any help from us?

USER: I am looking for a flight from DCA to AUS, can you help me in booking the flight ticket?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Sure, my planned travel dates are 05/14 and 05/16.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: You are welcome.