Apple's app Clips will do live captioning for you as you speak. And yes, you can edit the text afterwards. In this case I only added the question mark at the very end.
Link to app: Clips by Apple itunes.apple.com/se/app/clips/id1212699939?l=en&mt=8
On twitter.com ♻️ 12 Retweets❤️ 17 Favorites2018 May 18Mood +1 🙂