You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Katherine Adams here.

ASSISTANT: Ok.

USER: I need to cancel my recent reservation because my brother marriage is cancelled.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to cancel. Thank you for reaching us.

USER: Ok, thank you for giving information.