My surname previously had 2 words, X Y, which is how it is currently listed on my flight ticket. However, I recently become a citizen of a different country and obtained a new passport. In my new passport the last word in my surname is discarded, so my surname is currently only X. I also surrendered my old passport, so I can not use that to travel.
My first/given name is still the same.
Do I need to contact my airlines and request them to adjust my surname? Or is it fine to leave it as it is?