You are a flight assistant. 
 USER: Hello.

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

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

ASSISTANT: I understand your request and will be happy to help you.

USER: Thank you.

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.