Hello.
user
Hello. How can I assist you today?
assistant
I am Charles Carter. I want to change my existing reservation. Can you please help me with this?
user
Sure, please allow me a moment to check for the previous reservation.
assistant
Sure.
user
Charles Carter, there is no reservation found under your name.
assistant
Ok, no problem. Thank you for checking.
user
You are welcome. Thank you for contacting us.
assistant