Begin with 제가이해한게맞다면, state your interpretation and check with 맞아요? Here 게 is short for 것이. If the person says no, revisit the explanation and revise it.
Situation or form
Korean expression
상대설명: 회의중이라메시지를못봄
제가이해한게맞다면회의중이라서답을못한거예요. 맞아요?
이해가맞음
네, 맞아요.
이해를수정해야함
그뜻이아니라잠깐생각할시간이필요했어요.
다음행동제안
그럼급한일은전화해도될까요?
Understanding that a meeting delayed the reply is different from permission to call at any time. Ask separately about future actions. 알겠어요 can acknowledge understanding; do not treat it as consent to every proposal.