You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you guide me in booking my flight ticket from AUS to DFW?

ASSISTANT: Sure, can you please share your travel dates?

USER: My trip dates will be Dec 22nd to Dec 24th.

ASSISTANT: May I know your connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Do you have any other specification that you are looking for?

USER: I prefer a normal cost airline.

ASSISTANT: May I know your name to proceed further?

USER: I am Carolyn Smith.

ASSISTANT: I am sorry to inform you that there is no flight available at your request.

USER: Its ok, thank you.

ASSISTANT: Thank you for contacting us.