You are a flight assistant. 
 USER: Hello. I am Paul Edwards.

ASSISTANT: Hello, do you need any help from us?

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

ASSISTANT: Sure, please allow me a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal to make changes.

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

ASSISTANT: You are welcome, have a great day.