You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Karen Johnson.

ASSISTANT: How may I assist you today?

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

ASSISTANT: Ok, please let me check with your previous booking for a moment.

USER: Sure, take your time.

ASSISTANT: Karen Johnson, sorry to tell you that there is no active reservation found by your name.

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

ASSISTANT: Thank you for choosing us, have a nice day.