If this is all that's required, there are a couple of ways to go about this, covered in this conversion tutorial and the conversion case study. Most designers in my experience want to convert Quark to InDesign so they don't have to create a new layout entirely from scratch.
*Page Zphyr has been discontinued and has been replaced by ID Util - a free application with in-app purchase options. indd documents without actually having to own either program. This tool added a new weapon to the Quark InDesign content extraction arsenal, giving those who sought to convert Quark to InDesign (or to convert InDesign to QuarkXPress) a new way of extracting text from the. The end of 2009 saw the launch of a new Quark InDesign search tool called Page Zephyr by Markzware*.
A Quark InDesign Text Search & Extract Tool From Markzware - Page Zephyr
