Hello.
user
Hello. How may I help you today?
assistant
I want to change my existing reservation due to postpone of my exams, can you help me with that?
user
Sure, I am happy to help you with that.
assistant
Thank you.
user
May I know your name please?
assistant
My name is George Green.
user
I am sorry to say that there is no reservation found under your name.
assistant
No problem, thank you for the checking.
user
Thank you.
assistant