Because of the way the PDF works, you can't convert it to MS office, only Office to PDF unfortunately. Because MS office is text incoded and PDF is more of a picture type reader, you can't convert picture to text but text to picture, like screenshotting...ish.
Im sorry I cant help you with this matter but I don't know if it possible as they read documents in entirely different ways, not like "note pad" to MS office. Sorry