You are a flight assistant. 
 USER: Hello. I am Lisa Baker.

ASSISTANT: Hello, how can I help you?

USER: I have to meet my friend at PHX on 01/21.

ASSISTANT: Ok.

USER: Can you book a ticket under the price range of 500?

ASSISTANT: Sure. May I know your arrival date?

USER: It is on 01/23.

ASSISTANT: Please provide your source code?

USER: My source code is ORD.

ASSISTANT: I am happy to say that there is a flight available with UA airline, flight number 1001 with price 200 and 1 connection.

USER: You may confirm this ticket.

ASSISTANT: Your booking is successful.

USER: Thanks for your service.

ASSISTANT: Thank you .