Hello, I am Karen Evans.
user
Hello, please feel free to say, How may I help you?
assistant
I want cancel my reservation due to sudden health issue, so I can not travel.
user
Ok, Please hold on for a minute. I will check and revert to you.
assistant
Sure.
user
Thank you for waiting. I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.
assistant
Ok, thanks for informing.
user
 Thank you, for making us to serve you regarding ticket cancellation.
assistant