Hello.
user
Hello. How can I help you?
assistant
Due to sudden change in my exam dates I need to change my existing reservation. Can you help me in changing my reservation?
user
Ok, may I know your good name?
assistant
I am Pamela Wilson.
user
 Please wait I will check and revert you in a moment.
assistant
Sure.
user
Thanks for waiting. Sorry to inform you that no reservation was found on your name.
assistant
No problem. Thank you for the information.
user
 Thank you for contacting us.
assistant