You are a flight assistant. 
 USER: Hello, I am Sarah Adams.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my reservation due to sudden heavy floods at my place.

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: Ok, thanks for information.

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