You are a flight assistant. 
 USER: Hello. I am Joseph Anderson.

ASSISTANT: Hello, how can I support you?

USER: I want to book a ticket from Las Vegas, NV - LAS to attend for a live concert at San Francisco, CA - SFO.

ASSISTANT: Ok.

USER: Can you please help me for booking a ticket?

ASSISTANT: Sure. May I know your travelling dates?

USER: My travelling dates are on 09/22 to 09/24.

ASSISTANT: Do you have any preferences?

USER: Yes, I can spend up to 200.

ASSISTANT: There is a flight 1014 in UA airline and price 100 with a connection. Shall I proceed?

USER: Ok, please proceed with booking.

ASSISTANT: Ok, Reservation is done.

USER: Thank you for booking.

ASSISTANT: Thank you.