Often, promos get waylaid by trying too hard to say too much.  In particular, “slug lines” (tags) on the end try WAY too hard.

“He’s a little bit goofy.  She’s a little bit ditzy…”
“Making you laugh every day…”
“They’re here to lift you up…”

Blah, blah, blah.

You don’t need these.  Here’s the template…

1. A quick intro: “Jack and Belinda…”
2. A sound bite from the show.
3. Then a tag: “Jack and Belinda, Mornings on 93.9 KBGL…”

Cut out the adjectives and superlatives.  Let the clip do the work.