no we dont have dino dna
we have loads of mammoth dna, but that's because tons of them got frozen int eh permafrost in russia
also, we have elephants, so we can kind kind of think about breeding back mammoths from elephants...
mammoths only got extinct thousands of years ago, dinos got extinct tens of millions of years ago, we have very very little tissue from that time, and none of it with enough dna
then, even if the dna is retrieved, we cannot really make viable embryos from them because we dont know what that time's genes did (now you can compare similar genes between a rat and bird and dragonfly and man, and know ok these genes do so and so things - that information is missing for dinos)
then finally comes the question of who will be the surrogate mother. we cant exactly expect crocs or raptors to breed back trexes and velociraptors, we can kind of breedback extinct varieties of cats or dogs
so... this is more than unlikely, there are a whole bunch of milestones that must be achieved before this becomes possible. first we will be able to stop species from going extinct, then we will be able to bring back recently extinct species, after that we will be able to recreate any species we want, and only maybe then we will start bringing back the dinosaurs