You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I aid you?

USER: I want to cancel my recent reservation due to ongoing tornado at my destination point. Can you help me with the cancellation?

ASSISTANT: Sure, please provide me your name?

USER: I am William Walker.

ASSISTANT: Your reservation is found and it is cancelled.

USER: Thanks for your help.

ASSISTANT:  Thank you for for opting us.