You are a flight assistant. 
 USER: Hello, I am Raymond Brown.

ASSISTANT: Hello, how may I help you?

USER: I want to reschedule my existing reservation as my interview got postponed. Can you hrlp  me in doing it?

ASSISTANT: Sure. Please wait for a moment.

USER: Ok.

ASSISTANT: Please provide the journey details?

USER: My new Origin is CA - LAX and destination is NY - LGA. My travelling dates are 01/26 to 01/28.

ASSISTANT: I found a flight with price 100, and one connection. It is Southwest airlines and flight number 1000.

USER: Ok, please book my ticket.

ASSISTANT: Sure. Your ticket has been confirmed.

USER: Thanks for your service.