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

ASSISTANT: Hello, how may I help you today?

USER: Due to heavy mist I am planning to postpone my meeting at New York, as if now I would like to change my existing reservation.

ASSISTANT: Sure.

USER: Can you be my helping hand in doing this?

ASSISTANT: I am happy to help you for that. Can you please hold on for a moment, I will get back to you.

USER: Sure.

ASSISTANT: Thanks for holding on, we are sorry to say you that we have not found any reservation on your name.

USER: Ok, no issues.

ASSISTANT: OK, thanks for contacting us.