Hello.
user
Hello, how may I be at your service today?
assistant
I need to change my recent reservation, can you help me in doing that?
user
May I know your name please?
assistant
I am Charles Nelson.
user
 Sorry, there is no reservation matching with your name in our portal to make changes further.
assistant
Ok, not an issue. Thank you for the information.
user
Thank you for choosing us.
assistant