Hello.
Hello, how may I assist you today?
 I need to change my existing reservation as my exams got postponed, Can you please help me with that?
Sure, may I know your good name please?
I am Andrew Scott.
Please wait for a moment.
Sure.
Sorry Scott, there is no reservation found as per your name in our database.
Ok, no issues. Thanks for the information.
Thank you for reaching us with a query.