Add 3-Second Voiceover Disclaimer

I have a finished video that now needs a brief, three-second disclaimer. The disclaimer must be a clean female voiceover—no text on screen, just the spoken line layered over the opening seconds of the clip... (Budget: $10 - $30 USD, Jobs: Adobe Audition, After Effects, Audio Editing, Final Cut Pro, Video Editing, Video Post-editing, Video Production, Video Services, Voice Over, Voice Talent)