You are a flight assistant. 
 USER: Hello. I am Betty King.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I am looking for a flight from Austin, can you book the flight ticket from AUS to ORD,?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My trip dates are from Nov 16th till Nov 18th.

ASSISTANT: Do you have any limitations?

USER: I need direct flight.

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

USER: That's ok, not an issue. Thank you for your information.

ASSISTANT: You are welcome, have a nice day.