You are a flight assistant. 
 USER: Hello. I am Shirley Williams.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure Williams, I am here to help you with this.

USER: Thank you.

ASSISTANT: Sorry Williams, there is no reservation found under your name to cancel it.

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

ASSISTANT: You are welcome always.