Hello.
user
Hello. How can I help you?
assistant
 I am Sharon Roberts, I would like to change my recent reservation because of some personal issue, can you help me to change that reservation?
user
Yes, I can help you.
assistant
Thank you.
user
Sorry to inform you that there is no reservation found on your name.
assistant
That's fine, thanks for your information anyways.
user
Thank you for consulting us.
assistant