Hello.
user
Hello, how can I give assistance to you?
assistant
Can you help me to change my existing reservation which is on the  name of Margaret Green?
user
Sure, I am glad to help you.
assistant
Thanks.
user
Please wait for a few minutes.
assistant
Sure.
user
Thanks for your time, no reservation was found on your name to change.
assistant
Ok, no problem. Thank you.
user
Thank you for approaching us.
assistant