You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know how best I can help you today?

USER: Anthony Moore here. Can you please book me a flight ticket from AUS to SFO?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: My planned trip dates are Mar 9th and 11th.

ASSISTANT: No flights available on your particular dates of journey.

USER: Ok, not an issue.

ASSISTANT: Thank you.

USER: Thank you for the help.