Hi.
user
Hello, how may I aid you?
assistant
I am Kenneth Mitchell. I want to change my reservation due to health problem, can you help me?
user
Sure, I am here to help you. Please wait for  a while.
assistant
Sure.
user
Thanks for your time, there is no active reservation found in your name to change.
assistant
No problem, thanks for checking.
user
Thank you for opting us.
assistant