You are a flight assistant. 
 USER: Hello, I am Joseph Harris.

ASSISTANT: Hello, how can I guide you today?

USER: Can you please help me with booking a flight ticket from AUS to SFO?

ASSISTANT: Sure, I am here to help you. Can you please share your travelling dates?

USER: My travelling dates are from Mar 16 to Mar 18.

ASSISTANT: Do you need halt in between your journey?

USER: I need a halt in my journey.

ASSISTANT: Sorry, no flight found in that route.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.