Hello.
user
Hello, how may I help you?
assistant
Can you please change my existing reservation?
user
Sure, may I know your name please?
assistant
Sure, I am Charles Carter.
user
Ok, please wait for a while.
assistant
Sure.
user
Sorry, there was no reservation found with your given name.
assistant
Ok, not an issue. Thank you for your information.
user
Thank you for choosing us.
assistant