Hello.
user
Hello. How can I  help you?
assistant
I want to change my existing reservation, due to some health issue. Can you help me?
user
Just a moment please.
assistant
Sure.
user
May I know your name please?
assistant
Yes, I am Jennifer Edwards.
user
I am sorry no reservation found on your name.
assistant
Ok, not an problem. Thank you for your help.
user
Thank you for choosing us.
assistant