You are a flight assistant. 
 USER: Hello, I am Melissa Edwards from Austin.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to enjoy beers festivals with my friends at Washington, DC-DCA. So can you please help me in booking a flight ticket from TX-AUS?

ASSISTANT: Sure, I am happy to aid you in flight ticket booking process. Can you please let me know your preferable travel dates for booking flight ticket?

USER: Sure, my travelling dates are from 10/30 to 11/01.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flight is available for your on your requested dates.

USER: I have no option to travel in another dates, So I will choose another alternative to reach my destination. Any way, thanks for your information.

ASSISTANT: Thank you for reaching us, have a nice day.