Hello, I am George Brown.
user
Hello, how can I aid you?
assistant
I need to change my existing reservation due to cancel of my conference. Could you please help me?
user
Sure,  I am here to help you. Please stand by.
assistant
Ok.
user
Thank you for waiting, sorry no reservation found with your name.
assistant
No problem, thank you for the information.
user
Thank you for reaching us, have a nice day.
assistant