Quick Text Updates on Flyer

I already have the finished flyer in its native design file; I just can’t reach the original designer. All I need is a few simple text edits—specifically, the event dates have changed and a short section of the promotional copy must be refreshed. No images, colours, or layout tweaks are required; the file simply needs the revised wording dropped in and exported back to me as print-ready PDF plus the updated source file. If you can turn this around quickly without altering the existing design, please let me know your availability and estimated timeframe so we can wrap it up today.