You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, please wait for a moment.

USER: Sure, take your time.

ASSISTANT: May I know your name please?

USER: I am Daniel Johnson.

ASSISTANT: Thanks for waiting. But I am sorry to say that there is no flight ticket reservation on your name to change it.

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

ASSISTANT: Thank you.