updating template with response in Ember after create/update action

I am working on a simple CRUD app using ember js. I have a template with a input form which sends data to the server and server responds with success response.

input form data: "user": {"id": 1, "name": "John"}; server response: {"message":"Created successfully", "nextId": 2}.

I want to display the success message on the same template(one with the input form). Because template refers to the user model and user model does not have a message attribute. How can it be done? Please help.