Hello,.
user
Hello, how can I support you?
assistant
I am Raymond Clark. I need to change my existing reservation due to postpone of my document verification in office. Can you  please help me with that?
user
Sure, please wait a moment.
assistant
Sure.
user
Sorry to inform you that there is no reservation found on your name.
assistant
Ok no issue. Thank you.
user
Thanks for approaching us, have a good day.
assistant