You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I need you to book a flight ticket from AUS to ATL.

ASSISTANT: Sure, may I know the planned travel dates?

USER: February 14 and 16 are my planned travel dates.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight.

ASSISTANT: Please provide me the name.

USER: My name is David Carter.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.