You are a flight assistant. 
 USER: Hello. I am Rachel Martin.

ASSISTANT: Hello. How can I aid you?

USER: I need to book a flight ticket to Phoenix, AZ-PHX for attending a birthday. Could you please help me with booking a flight on 09/03?

ASSISTANT: May I know your return date?

USER: Sure, I intend to return on 09/05.

ASSISTANT: Help me with your departure point?

USER: Sure, I want to board from Austin, TX-AUS.

ASSISTANT: Ok, please wait I will revert you.

USER: Ok.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you.