You are a flight assistant. 
 USER: Hello. I am Patrick Moore.

ASSISTANT: Hello, what kind of help are you seeking from us?

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.

USER: Thank you.

ASSISTANT: Sorry, there is no reservation found on your name to change.

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

ASSISTANT: Thank you for availing us.