You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you for today?

USER: I am Katherine Collins, my exam was cancelled because of that I want to cancel my recent reservation, can you help me?

ASSISTANT: Sure Katherine, please wait for a moment.

USER: OK, sure.

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

USER: OK, thank you.

ASSISTANT: You are welcome.