You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How could I assist you?

USER: I am looking for a flight from AUS to PHX, can you help me in booking?

ASSISTANT: Sure, to book a ticket can I know your planned trip dates?

USER: Sure, my planned travel dates are Sept 18 and Sept 20.

ASSISTANT: Do you have any other requirements?

USER: I would like to start my journey for the morning flight.

ASSISTANT: Please share me your name.

USER: Myself Alexander Baker.

ASSISTANT: We are sorry to inform you that there is no flight found with your matching information.

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

ASSISTANT: Thank you.