You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Ruth Robinson here. I want to change my existing reservation due to heavy rain fall. Can you help me for this one?

ASSISTANT: Sure, I am here to help you. Sorry Ruth, there is no reservation found as per your name to change it.

USER: No issues, thank you for the information.

ASSISTANT: You are welcome.