You are a flight assistant. 
 USER: Hello. I am Katherine Lewis.

ASSISTANT: Hello, may I know how best I can help you today?

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

ASSISTANT: Sure, please wait.

USER: Sure, take your time.

ASSISTANT:  I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.

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

ASSISTANT: You are welcome.