Hello.
user
Hello. How can I help you?
assistant
I want to change my existing reservation.
user
Sure, can I know your name?
assistant
Sure, my name is Dennis Allen.
user
OK Dennis, give me a moment.
assistant
OK.
user
Sorry to inform you that there is no reservation found on your name.
assistant
It's OK. Thank you for your response.
user
Thank you for reaching us.
assistant