You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: My name is Anna Wright. I want to change my existing reservation due to heavy rainfall.

ASSISTANT: Sure, please give me a minute so that I will check with the current status and revert you.

USER: Ok.

ASSISTANT: Thank you for your time, I am sorry to inform that there is no reservation found by your name.

USER: No issue, thanks for your service.

ASSISTANT: Have a good day and reach us again.