Hello.
user
Hello, how may I aid you today?
assistant
Gregory Johnson here, I need to  amend my reservation. Can you help me out please?
user
Sure, I am here to help you out in amending your reservation. Please allow me a moment to check the reservation details on your name.
assistant
Ok, please check with that.
user
Sorry Johnson, there is no active reservation on your name in our database.
assistant
That's not issue.Thank you for the information.
user
Thank you for information.
assistant