Hello.
user
Hello, how may I support you at present?
assistant
I want to change an existing reservation, so please help me in changing the reservation.
user
Sure, I am here to help you to change it.
assistant
Thank you.
user
Let me know your name please.
assistant
Myself Jack White.
user
Ok, please wait for a moment.
assistant
Ok.
user
Sorry to inform you that, there was no reservation found on your name to change it.
assistant
Not an issue. Thank you.
user
Thank you for reaching us.
assistant