Hello.
user
Hello, how can I help you?
assistant
I want to change my existing reservation, as my exams have postponed suddenly. Can you please help me ?
user
Sure, may I know your name please?
assistant
I am Karen Perez.
user
Sorry, there is no reservation with your name to change further.
assistant
Ok, not an issue. Thank you for your time.
user
My pleasure.
assistant