Hello.
user
Hello, how may I aid you today?
assistant
I am Raymond Adams. I want to change my existing reservation due to postpone of my exams, can you help me with that?
user
Sure, I am here to solve your problem. Please allow me a moment to check whether any reservation is found on your name or not.
assistant
Sure, take your time.
user
Sorry  Raymond Adams, there is no reservation found on your name in our database.
assistant
That's ok, no problem. Thank you.
user
Thank you for reaching us.
assistant