Hi. I am Brain Wilson.
user
Hello. How can 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, I will help you to change your reservation.
assistant
Thank you.
user
Please allow me a moment. Sorry, no reservation found on your name to change your reservation.
assistant
Ok, no problem. Thanks for your information.
user
Welcome, have a nice day. Thank you for choosing us.
assistant