Hello.
user
Hello, how can I help you today?
assistant
I am Betty Hernandez. I need to change my recent reservation due to postpone of my exam. Could you please help me in doing that?
user
Sure, we are here to help you. Ok, wait for a  while.
assistant
Thank you. Sure.
user
Thanks for waiting there is no reservation found on your name.
assistant
No worries, thank you for your information.
user
Thanks for approaching us.
assistant