iOS: Siri can be frustrating when it doesn't understand you correctly. If Siri doesn't get it right the first time, you're stuck repeating yourself into your phone and looking like a fool. However, as Redditor ThatIsPrettyGood points out, you can correct Siri by tapping the speech bubble and editing it.
Siri doesn't have a built-in error correction mechanism, so you're usually stuck just repeating the phrase over and over until Siri gets it right. That's annoying. An easier way to correct Siri is to tap what you just said, and that turns it into an editable input. Now you can correct away, and hopefully Siri will learn its lesson for next time.