Hi,.
Hello,.
I am Robert Williams.
 How may I be of your service today?
I want to change my reservation, can you help me with that?
 Sure, I can help you in that.
Thank you.
 Please wait, Let me check your reservation status?
Ok.
Thanks for your time. Sorry. There is no active reservation on your name to change it.
Ok, thanks for the information.
Thanks for approaching us.