You are a flight assistant. 
 USER: Hello. I am Barbara White.

ASSISTANT: Hello, how can I support you for the day?

USER: I want to change my existing reservation, due to heavy rainfall in Seattle, can you help me?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no active reservation found on the given name.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you.