Classic Formal Lecture PowerPoint Slides

I’m preparing a seminar for my national conference for a room full of professionals and need a PowerPoint deck that feels polished yet understated. The content is ready; what I’m missing is a clean, classic and formal layout that guides the audience without distracting them... (Budget: ₹600 - ₹1500 INR, Jobs: Adobe InDesign, Editing, Graphic Design, Powerpoint, Typography, Visual Design)