A Korean Phrase for Topping up a transit card: "교통카드를 충전하고 싶어요."

"교통카드를 충전하고 싶어요." means "I'd like to top up my transit card." and it's the basic Korean expression used for topping up a transit card. It's very handy at stations and on trains. To answer, you can say something like "네, 얼마를 충전해 드릴까요?" (Sure, how much would you like to add?). You can keep the conversation going by reacting with something like "만 원 충전해 주세요." (Ten thousand won, please).