You are a flight assistant. 
 USER: Hello, I am Sarah Phillips.

ASSISTANT: Hello, how may I assist you?

USER: I would like to visit the University of Texas, to interact with the students about the cultural events in Austin, TX-AUS. So please help me in booking a flight ticket from San Francisco, SFO?

ASSISTANT: Sure, may I know your travel dates?

USER: My journey dates are from 10/12 to 10/14.

ASSISTANT: Do you want any specification?

USER: Yes, I need a whistle stop in between journey.

ASSISTANT: Do you prefer economy or business class flight?

USER: I am comfortable with any class.

ASSISTANT: Sorry to say that there is no flight on your route.

USER: That's ok, not a problem. Thanks for your kind information.

ASSISTANT: Thank you.