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