Unlike a cold invite, a warm invite is for someone who knows you but not well with regular contact. In this case, it’s still good to provide details of your podcast to make sure they recognize your who you are.
Hey[Guest Name here, etc],
It’s [Your Name here)(link to LinkedIn profile, any social media platform that shows profile photo, bio]. [Insert your connection with them. For example where you met or what you did together.]
I don’t know if you know but I have a podcast called [podcast name]. [Insert a summary of your podcast and include a link to an episode with another guest.]
Would there be any way that I could interview you for my podcast? [my main audience is x,y,z and people would be x,y by what you are doing or your journey].
Let me know if I can feature you on my show.
[Your name] [Name of your podcast - include a link to listen to your podcast]