I was behind a couple of boys/jungen at the grocery store checkout and one bought some Xbox card that needed a special receipt. When that was done, the woman who checked him out greeted me and said, “Keine ahnung [something something something].” To which I readily and less-than-confidently responded, “Ja, ich auch.” And it worked! She felt understood and I was elated after wishing her a “Guten abend.” Small victories.

Keine ahnung = no idea

Ja, ich auch = yeah, me too