Hello, I am Helen Roberts.
user
Hello. How can I aid you?
assistant
I would like to alter my existing reservation.due to heavy rainfall my examination dates has been postponed. Could you please help me with changing?
user
Ok, please wait I will revert you.
assistant
Sure.
user
Sorry, no reservation was found on your name.
assistant
Ok, no issues. Thank you.
user
 Thank you for availing us.
assistant