Hello.
user
Hello. How can I assist you now?
assistant
I want to change my existing reservation, as my exams got postponed. Can you please help me out with it?
user
Sure, I am happy to help you with that.
assistant
Thank you for the response.
user
Can I have your good name please to check your reservation status?
assistant
Myself Mary Brown.
user
Ok, please wait  a moment.
assistant
Ok, sure. I will wait for your response.
user
Sorry Mary Brown, no reservation has found under your name to change.
assistant
Ok, not an issue. Anyways, thank you for the information.
user
Thank you for choosing us, have a good day.
assistant