Hello.
user
Hello. How can I help you?
assistant
I am Kevin Clark. I want to chanhge my existing reservation, due to some health issue. Can you please help me?
user
Sure, I will help you to change your reservation.
assistant
Thank you.
user
Sorry, there is no reservation found on your name to change.
assistant
It's ok, thank you for checking.
user
Welcome, have a nice day.
assistant