Ordering a coffee: Choice of bean which can vary by origin, roast type, or blend.

🇨🇳 [你好] is standard and polite, but in many real coffee shops people may skip it and go straight to the order, or use [你好] just to get staff attention.

💬 [要] often means "want" or "would like" before a thing: [我要咖啡], [我要大杯]. It can sound more direct than English "I'd like," but in ordering food and drinks that's normal.

💬 [我要] is a very common ordering pattern: [我要] + item, like [我要一杯咖啡] or [我要小杯]. In shops, this direct style is normal and not rude.

💬 [一] changes tone before most words, so in [一杯] it's said (yì), not (yī). You'll hear the same in [一个] and [一张].

💬 [杯] is the counting word for cups and cupfuls: [一杯咖啡], [两杯茶]. Chinese usually needs one of these counting words between a number and a noun.