How to capture only the text from the file and paste the text within the slides?

When converting a PDF file that was made from a Power Point File into Word format, the conversion looks like a 3-slide per page Power Point format, and I only want the text from the slides...how can I capture just the text from the slides without having to go into each individual slide and copy and paste the text within the slide?

I bought this product to save time.

Thank you very much!