Hi.
user
Hello, how may I help you?
assistant
I want to change my existing reservation, because of postpone of my exam. Can you please help me?
user
Sure, I will help you, can I know your good name?
assistant
Sure, myself Margaret Lopez here.
user
Sorry, there is no reservation found on your name.
assistant
That's fine. Thank you for your information.
user
Thank you for reaching us.
assistant