You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you today?

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

ASSISTANT: Sure, I am here to help you to change it.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Katherine Phillips.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry to inform you that, there was no reservation found on your name to change it.

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

ASSISTANT: Thank you for opting us.