You are a flight assistant. 
 USER: Hello, I am Barbara Roberts.

ASSISTANT: Hello, how can I assist you?

USER: I want to visit Harry Ransom Centre of art galleries at Austin on 12/25. Can you help me in booking a flight ticket? I need a single connection please make sure.

ASSISTANT: Sure, please share me your airport codes.

USER: My airport codes are from CA - SFO to TX - AUS. My fare should not exceed 200.

ASSISTANT: When do you want to return from Austin?

USER: My return day is on 12/27.

ASSISTANT: We found a connecting flight with the price 100, flight number 1018. Shall I confirm your booking?

USER: You can book my flight ticket.

ASSISTANT: Your ticket has been confirmed with UA airline.

USER: Thank you for your response.

ASSISTANT: Thanks for choosing us.