You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I best assist you now?

USER: I am looking to book a flight ticket from AUS to SFO. Can you help me for that?

ASSISTANT: Sure, can you please let me know your travelling dates?

USER: My travelling dates are Mar 28 and Mar 30.

ASSISTANT: Do you need any lay by in between journey?

USER: I prefer to book a direct flight in my journey.

ASSISTANT: Is there any other specifications regarding your journey?

USER: No.

ASSISTANT: May I know your good name please?

USER: My name is Charles White.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: We are sorry to say that, there is no flight found on your requested dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thanks for consulting us, wish you a great day.