You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: Myself Christopher Allen. Please book a flight ticket form AUS to SFO. My travelling dates are from 03/22 and 03/24.

ASSISTANT: Ok, let me check for the availability of flight.

USER: Sure.

ASSISTANT: Christopher, there is a flight available with price 200. Would you like me to proceed the booking?

USER: Please proceed it.

ASSISTANT: Sure. Your booking confirmed. Your flight number is 1000 with Southwest airline.

USER: Thank you so much.

ASSISTANT: You are welcome. Thank you for contacting us.