Hello.
user
Hello. How can I assist you at this moment?
assistant
My scheduled examination dates has been postponed, could you please help me with changing my recent reservation?
user
Sure, I am happy to help you with that. Can I have your name please to check your reservation status?
assistant
My reservation was done under the name Jennifer Walker.
user
Sorry to inform you that  no reservation has found under your name to change.
assistant
Ok, not an issue. Anyways, thank you for the information.
user
Thank you for choosing us, have a good day.
assistant