I would like to submit a complaint about ‚Alesia‘ (this is the name she gave me) manning the passport check-in desk for flight AC 879 in Zurich at ca. 8:30 on 4 February 2020. Ms. ‚Alesia' refused to speak to me in German (after I greeted her in this language) and then, instead of simply telling me I was at the wrong desk (I should have been in a particular zone, I didn't realize until I spoke to Ms. Alesia) she treated me as what I perceived to be surprisingly arrogantly. She then refused to serve me after I asked that we continue in German, my mother tongue and the local language. Other check-in agents were, in contrast, friendly and efficient, what would be expected from a traveller.