Hello,.
user
Hello.
assistant
I am Daniel Martin.
user
 How can I aid you?
assistant
Can you please change my existing reservation, due to postpone of my exams?
user
Ok, please wait I will revert you in a moment.
assistant
Sure.
user
 Sorry to inform you that no reservation was found on your name in our data base.
assistant
Ok, no issue. Thank you for your information.
user
 Thank you for availing us.
assistant