What if I send the wrong message?

This kind of short message can only be sent to the interview first, depending on the situation of the seniors. Since he knows that you are going for an interview, you are texting him that you made a mistake, which will make him think that you are showing off to someone. Go to the interview with confidence, be honest with him if you are shy, and be honest if you fail, which will make you add points in others' hearts.