"No, there is a crosswind of 19, I have decided that for the time being my personal limit is 15"
would be fine. (As long as you'd thought up, in advance, your answer to the obvious next question: "so, if you knew you weren't going to be able to land, why did you take off then".)
Oh, it was the ground part of the flight test. The runway length also wasn't the best to try a 19kt crosswind for a first either.