Hello.
user
Hello, how can I guide you?
assistant
I am Rachel White.
user
Hope you are doing well Rachel White.
assistant
Actually, I want to change an existing reservation, because of health  issue. Can you help me out?
user
Sure, I am here to help you. Sorry, there is no previous reservation found on your details.
assistant
Thank you for your help.
user
You are welcome.
assistant