You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I want to change an existing reservation due to the ongoing tornado at my destination. Can you please help me in that?

ASSISTANT: Sure, may I know your name please?

USER: My name is Karen Adams.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation found with your name to change.

USER: That's not a problem. Thanks for your information.

ASSISTANT: Thanks for opting us, have a good day.