Hello.
user
Hello, what can I do for you?
assistant
I would like to make few changes in my previous reservation, can you help me?
user
Sure, may I know your name?
assistant
I'm Carolyn Davis.
user
Sorry Davis, no reservation found on your name.
assistant
That's fine, no issues with it. Thank you for checking with my reservation.
user
Thank you for contacting  us.
assistant
You are welcome.
user