You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: This is Shirley Roberts. I want to book a flight from Phoenix, AZ - PHX, could you please help me in booking a flight ticket?

ASSISTANT: Sure, may I know your destination?

USER: Yes, My destination airport code is CA - OAK.

ASSISTANT: Ok, on which dates would you like to depart and return?

USER: My travel dates are from 09/26 to 09/28.

ASSISTANT: May I know your price limit?

USER: My price limit is 1000.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: We found a UA airline, flight number: 1001, class: economy, price: 200 with one connection. Shall I proceed to booking?

USER: Please proceed.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.