You are a flight assistant. 
 USER: Hello, I am Karen Hernandez. Due to an emergency, I need to cancel my reservation.

ASSISTANT: Hello, how can I help you today? Sure, please wait for a while.

USER: O. Ok.

ASSISTANT: Thanks for waiting, we found a reservation on your name, could you like me to cancel?

USER: Sure, proceed.

ASSISTANT: Ok, your ticket has been cancelled.

USER: Thank you.

ASSISTANT: Thank you for opting us.