You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure, I will help you with this.

USER: Thank you.

ASSISTANT: There is a reservation found on your name, shall I cancel it?

USER: Please cancel the reservation.

ASSISTANT: Your reservation has been cancelled successfully.

USER: Thank you for your help.

ASSISTANT: You are welcome.