Hi. I am Frank Miller.
Hello, how can I provide assistance to you?
 I would like to change my existing reservation due to postpone of launching a new product at Philadelphia. Can you help me out?
Sure.
Ok.
Please wait for a while, I will check your reservaion.
Sure, take your time.
Thank you for waiting, there is no reservation found on your name.
Not an issue. Thank you for your kind information.
Thank you for approaching us.