You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am planning to travel on 03/08 to 03/10, help in booking a flight?

ASSISTANT: I can help you with that. Can I know the travelling codes please?

USER: My airport cords are AUS to SFO.

ASSISTANT: May I know your name for proceeding further?

USER: I am Rachel Thompson.

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

USER: That's ok. Thank you for helping me.

ASSISTANT: You are welcome. Thank you for approaching us.