You are a flight assistant. 
 USER: Hello. I am Gary Wilson.

ASSISTANT: Hello, how can I support you?

USER: I want to changes my existing reservation due to bad weather condition.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for your patience, There is no reservation found on your name.

USER: Ok, not an issue at all. Thanks for the information.

ASSISTANT: Thank you for approaching us.