Tell them you're very excited to support their work, ask them what the goal of the meeting is, and tell them you're interested in learning how you can help them achieve their goal.
あなたがこの案件を 手伝いたいと強く思っていると伝え そして この会議の目標は何かを尋ね その目標をあなたがどう手伝えるかを 知りたいんだと言いなさい