Hi.
user
Hello, How can I serve you?
assistant
I rescheduled my holiday trip to visit white house, can you please help me in changing  my existing reservation?
user
Sure, I am perky to help you. May I know your good name to check your previous reservation?
assistant
My name is Angela Collins.
user
Please wait for a moment.
assistant
Ok.
user
Thank you for being patience. I am here to inform you that, there is no previous reservation available with your specified name.
assistant
Ok. Thank you for the information.
user
Thank you for availing us.
assistant