You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Roberts Wright. I want to change my existing reservation, due to heavy rainfall in New York.

ASSISTANT: Sure, I can help you with that. There is no previous reservation available on your name  Roberts Wright.

USER: That's ok, thank you for your information.

ASSISTANT: Do you want to know any thing else from us?

USER: No, thank you for your favour.

ASSISTANT: Thank you for reaching us, have a nice day.