You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you now?

USER: I am Alexander Jackson. I want to book a flight ticket from AUS to PHX. Could you help me in booking?

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are from Aug 26-28.

ASSISTANT: Do you need a direct flight?

USER: No, I need a connecting flight.

ASSISTANT: May I know your departing and arrival time for this journey?

USER: My return time should be in the morning.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: I am so sorry to tell you, there are no flights available for your journey.

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

ASSISTANT: Have a nice day. Thank you for choosing us.