You are a flight assistant. 
 USER: Hello. I am Ryan Parker.

ASSISTANT: Hello Ryan Parker. How can I help you?

USER: I would like to travel from LAX to AUS as my meeting purpose, can you please help me to book a flight ticket?

ASSISTANT: May I know your journey dates please?

USER: I have planed to travel on June 25th and return on June 27th.

ASSISTANT: Do you have any class preference?

USER: No, but I want to depart at afternoon time.

ASSISTANT: Is there any connection limit?

USER: I prefer connecting flight.

ASSISTANT: Are there any airline preference?

USER: Yes, I prefer connecting flight.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: I regret to inform that there are no preferred flight on your route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us.