péngyou hé fúwùyuán tīng dào guòmǐn, cái huì rènzhēn bāng nǐ quèrèn chéngfèn

朋友和服务员听到过敏，才会认真帮你确认成分。

Only when friends and waitstaff hear about an allergy will they carefully help you confirm the ingredients.