You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be of your helping hand?

USER: I planned to attend for a meeting in DCA, can you please help me to book a flight ticket from AUS?

ASSISTANT: Sure, help me with the trip dates?

USER: I prefer to travel on Dec 10 and Dec 12.

ASSISTANT: May I know your name for the booking process?

USER: I am Michelle Carter.

ASSISTANT: Do you have any specifications to be met?

USER: I need a direct flight.

ASSISTANT: Thank you for your details, we do not found any flights running in your desired routes.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us. Hope to serve you again.