Translation of ascertain in German

My family is doing well except for my youngest daughter. She is a little ill and needs to visit many doctors. She has had several infections lately, but nothing dangerous, so we are not too worried.
how are you? Where do you live in Austria? I hope your Spanish is good enough that you understand my sentences! If you can't understand it i will write this in English. I live in Munich, btw.
Fortunately and against all odds there were seats available so that we changed our booking to the same day. Our destination was El Calafate in the South of Patagonia in order to see the glaciers.