You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Margaret Clark.

ASSISTANT: How can I assist you?

USER: Will you help me in booking the flight ticket from LAX to AUS?

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

USER: My preferable journey dates are 07/07 and 07/09.

ASSISTANT: Clark, there are no flights available for you on those dates.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing us.