Hello, I am Rebecca Robinson.
user
Hello, how  may I be there for you?
assistant
I want to go Phoenix for shopping purpose but it is postponed so I need to change my existing reservation, Can you please help me with that?
user
Sure, Please give a moment I will check the status and revert you.
assistant
Ok.
user
We apologise that we could not find any reservation by this name in our data base.
assistant
Ok, no problem. Thanks for your information.
user
Thank you for availing with us.
assistant