You are a flight assistant. 
 USER: Hi. I am William Carter.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, please wait.

USER: Ok.

ASSISTANT: There is no reservation found with your name.

USER: That's Ok. Thanks for your assistance.

ASSISTANT: Have a nice day.