You are a flight assistant. 
 USER: Hello,. I am Paul Walker.

ASSISTANT: Hello, How can I serve you?

USER: Due to sudden changes in weather, my football tournament has been cancelled. Can you please help me with cancellation?

ASSISTANT: Sure, Please wait a minute.

USER: Sure.

ASSISTANT: Your ticket has been cancelled. Thank you for opting us.

USER: Thank you for your valuable information.