Hi.
user
Hello, how may I help you?
assistant
 I need to change my existing reservation as my exams got postponed, Can you please help me with that?
user
Sure, we are here to help you. Can I have your good name?
assistant
George Robinson here.
user
Sorry, there is no active reservation on your name in our records.
assistant
No issue, thanks for the information.
user
Thank you for choosing us.
assistant