You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I need to book a flight ticket from AUS to DFW, Can you please help me for booking?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel dates please?

USER: I would like to travel on 10/10 to return on 10/12.

ASSISTANT: Ok, please let me know the timings of your journey.

USER: No.

ASSISTANT: Do you have any more specifications?

USER: I am comfortable with economy class and I need a connecting flight.

ASSISTANT: Can I have your good name please to proceed further?

USER: Elizabeth Martin.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that no flight is available to you on your dates due to some issues.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for choosing us, have a good day.