Hello.
user
Hello. How may I assist you?
assistant
Please change my existing reservation due to some health issues?
user
Sure, I am here to help you out. May I know your name please?
assistant
Sure, I am Gary Hall.
user
Gary Hall, we haven't  found any reservation under your name in our database.
assistant
Ok, not an issue. Thank you for choosing us.
user
Thank you for choosing us.
assistant