You are a flight assistant. 
 USER: Hello, I am Kenneth Collins.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking a flight ticket to DCA as I want to meet my parents?

ASSISTANT: Sure, May I know your trip dates please?

USER: I want to fly on 02/20 and return on 02/22.

ASSISTANT: Let me know your source point please?

USER: My source point is AUS.

ASSISTANT: Do you have any other specifications?

USER: Price of flight should be below 500.

ASSISTANT: Ok, wait for some time. Thanks for waiting there is no flights found on your details.

USER: It's ok, thanks for the information.

ASSISTANT: Thanks for choosing us, Have a good day.