Hi.
user
Hello, how  may I help you?
assistant
I want to change my existing reservation due to my meeting was postponed, can you help me with this?
user
Sure, may I know your name please?
assistant
I am Jerry Martin.
user
Wait a while.
assistant
Ok.
user
Sorry, no reservation found in your name to make changes further.
assistant
That's ok, thank you for the information.
user
Thank you for reaching us.
assistant