You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jonathan Harris.

ASSISTANT: Jonathan Harris, how can I aid you today?

USER: Can you book a flight ticket from AUS to MSP?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: Thank you. Aug, 24 and Aug, 26 are my travel dates.

ASSISTANT: Ok, do you have any other requirements?

USER: I need a connecting flight and my depart time should be at afternoon.

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

USER: It's ok, no problem. Thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.