Which Sinhala phrases are actually useful and respectful for a tourist to learn

Locals genuinely love when foreigners try. Top ten Sinhala phrases worth learning: "Ayubowan" (the formal greeting with palms together, very respectful), "Sthuthi" (thank you), "Hari" (okay/good), "Epa" (no, with a smile), "Karunakaranna" (please), "Mata Sinhala thiyenne nehe" (I do not speak Sinhala, gets a smile), "Mokakda meka?" (whats this?), "Kiyada?" (how much?), "Rasai!" (delicious!), and "Sapa" (chili spicy, useful for "miris adui" = less spicy). In Tamil areas (Jaffna, east coast, hill tea estates), use Tamil instead: "Vanakkam" (hello), "Nandri" (thank you), "Illai" (no), "Eppadi irukkireenga?" (how are you?). Pronunciation matters less than effort. Mix in English freely, almost everyone understands basic English.