You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jeffery Brown.

ASSISTANT: how can I help you?

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

ASSISTANT: Sure, please wait.

USER: Ok.

ASSISTANT: Sorry , no reservation found on your name.

USER: Ok, thank you.

ASSISTANT: Thank you for approaching us.