You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ryan Jones.

ASSISTANT: How may I help you? Nice to meet you Ryan.

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

ASSISTANT: Sure, please wait for a moment.

USER: Sure, take your time.

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

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

ASSISTANT: Thank you.