You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Could you please help me in flight ticket booking process from AUS to OAK?

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

USER: Thank you for your response, I want to take off on Dec 11 and book my return ticket also on Dec 13.

ASSISTANT: May I know how many stopovers do you need in between your journey?

USER: Yes, I want a connecting a flight.

ASSISTANT: Please let me know if you have any other specifications.

USER: I would like to travel in business class flight.

ASSISTANT: Can I have your good name please?

USER: Sure, my name is Larry Hernandez.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates with your given details.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.