During the conversation, I would like to write down some of the important words.
So would it be possible to give me the time to write down some of these important words.
ご質問ありがとうございます。
「会話で出てきた重要単語を[書き留めたい](https://eikaiwa.dmm.com/uknow/questions/26978/)」は英語で「During the conversation, I would like to write down some of the important words.」と言います。
もし、書き留めのために、時間が要ると伝えたいなら、そうすると上記の英文の後、「So would it be possible to give me the time to write down some of these important words.」と言えます。
ご参考になれば幸いです。