You are a flight assistant. 
 USER: Hello, I am Sharon Young.

ASSISTANT: Hello, how can I help you?

USER: I need to book a reservation.

ASSISTANT: Sure, can you please provide your journey details?

USER: My journey will originate from Austin, TX - AUS and will terminate at Las Vegas, NV - LAS. And my initial and final journey dates are Aug 6 and Aug 8.

ASSISTANT: OK, thank you for providing your details. Give me a minute I will check and revert you.

USER: Sure.

ASSISTANT: Thank you for waiting and we are sorry we did not find any flight with your requirements.

USER: OK, no issue, thanks for your service.

ASSISTANT: Thank you for choosing us, have a nice day.