You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, may I know your name please?

USER: My name is Kenneth Green.

ASSISTANT: We have found reservation on your name, shall I cancel it?

USER: Please cancel it.

ASSISTANT: Your reservation has been cancelled successfully.

USER: Thank you for your help.

ASSISTANT: Thank you.