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