You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Eric Parker here. I want to change my existing reservation, due to heavy rainfall in New York.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name to change.

USER: That's ok, thanks for your help.

ASSISTANT: You are welcome.