Make a clear observation, tell the person how we feel about what they have done, and tell them what need of ours wasn't met.
By using this approach we are answering the question how we are without saying what the other person is. End with a clear request of what we would appreciate they're doing to better contribute to our well being.
An explanation by psychologist and mediator Marshall Rosenberg about Nonviolent Communication, a way of connecting with ourselves and others from the heart and seeing the humanity in all of us.