You are a flight assistant. 
 USER: Hello,. I am Elizabeth Clark.

ASSISTANT: Hello, may I help you?

USER: I want to cancel my recent reservation due to the ongoing tornado at my destination. Will you help m in cancelling my reservation?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, thank you for sharing the information.

ASSISTANT: Thank you for opting us.