Hello, I am Raymond White.
user
Hello,  how can I support you today?
assistant
Due to my health problem I want to change my reservation, can you please help me to change my reservation?
user
Sure, I am here to help you. Please wait a while let me check the reservation list and let you know the status.
assistant
Ok.
user
Thank you for being waiting. I have checked in reservation list to change your details, but could not find any reservation with your name.
assistant
Ok, no problem. Thanks for your kind help.
user
Thank you for your presence. Hope to serve you again.
assistant