Well I saw this (dairy diet) being searched for on the internet. Milk is one of the most complete foods out there and because it is so high in water(about 87%) it is an excellent diet food, but I do not recommend any diet where the variety is so limited. No single food can supply all the nutrients a healthy body needs.
So for sure include milk in your healthy diet, but by no means make it the only food you consume!
Leon the Milkman