Cut 2 rectangles out of the fabric (fabrics 1 & 2). Cut a rectangle out of the interfacing that is just slightly shorter than fabrics 1 & 2.
Cut a smaller rectangle out of the canvas (use what you have on hand). This is fabric 3. Print all the information you want onto the canvas using fabric ink and stamps or a fabric marker. I used a thin-tipped Sharpie & it didn't bleed on the canvas. Turned out quite nice.
Cut about a 6-8 inch sized piece of elastic (this is what you'll use to attach the tag to your suitcase).
Sew fabric 3 onto fabric 2 using a zig-zag or other decorative stitch.