【Skill 3】Understand when to present coupons
Put these two skills together to understand when to present coupons.
[Skill 1] Understand when to present coupons from 注文時 (when ordering) and 会計時 (when paying)
[Skill 2] Understand when to present coupons from 予約時 (when making a reservation) and 入店時 (when entering the restaurant)