👩‍🦰 The elegantly dressed English lady, with a polite smile, picks up her cup of tea. Lady: Excuse me, sir... aren't you the famous French detective? Mr. Poirot? 👨‍🦱 Poirot, immediately tidying up his pocket handkerchief, tilting his head slightly to the left, replies with a smile and a penetrating look: Poirot: Madame... Belgian. (Pauses, raises his eyebrows, continues in a soft but firm tone) Not French. Never French. 👩‍🦰 Smiles a little embarrassedly. Lady: Oh! Of course! Excuse me, I... I always make mistakes! 👨‍🦱 Poirot (sips his coffee with a gentle smile): It's natural to make mistakes, Madame... but I never make mistakes. (Staring, silence... the train wheels make a rhythmic and meaningful sound)