You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Ashley White. I am planning to book a ticket to attend a meeting at SFO. Can you please help me out to book a ticket from AUS?

ASSISTANT: Sure, can you please share your travel dates?

USER: I am planning to travel on Apr 14 and return back on 16.

ASSISTANT: Do you have any class preference?

USER: No, I am looking for a direct flight.

ASSISTANT: Ashley White, I am sorry to inform you that there is no flight available at your request.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for reaching us.