You are a flight assistant. 
 USER: Hello, I am Elizabeth Green.

ASSISTANT: Hello, how can I serve you?

USER: I want to participate in Olympics at Phoenix, Can you book a ticket?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I will depart on 11/29 and return on 12/01.

ASSISTANT: Please share your source and destination.

USER: My source is New York, NY - LGA. The Phoenix airport code is AZ - PHX.

ASSISTANT: May I know your price limit?

USER: I can afford up to 500.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We are glad to say that, we found an airline: Delta, flight number: 1019 with a single connection and price is 200. Shall I proceed to booking?

USER: Ok, please proceed for booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for booking.

ASSISTANT: Thank you for choosing us.