You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Susan Hernandez, want to travel from AUS to DFW to attend my conference meeting. Please help me in booking my ticket.

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My travelling dates are from 12/11 to 12/13.

ASSISTANT: Do you have any airline preferences?

USER: No.

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

USER: Yes, I need a direct flight.

ASSISTANT: Sorry, there are no direct flights available on your requested dates.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for contacting us, have a nice day.