You are a flight assistant. 
 USER: Hello, I am Gregory Wright.

ASSISTANT: Hello, how may I aid you today?

USER: I want to change my existing reservation due to heavy snow fall. Can you be my helping hand?

ASSISTANT: Ok. Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on name.

USER: That's ok, not an issue. Thank you for your assistance.

ASSISTANT: Thank you have a joyful day.