You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Mark Young.

ASSISTANT: How may I assist you?

USER: I would like to travel from AUS to DFW, could you help me out?

ASSISTANT: Sure, I will help you. Please share your planned travel dates.

USER: My preferable dates are from Aug 9-11.

ASSISTANT: Do you have any preferences?

USER: Please check for 1 connection flight.

ASSISTANT: Mark Young, no flights has been found on your planned travel dates.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you for choosing us.