Apple has acquired the voice-based personal assistance and search service Siri, according to a newly-published FTC document (PDF Link). Business Insider reports that a Siri representative has confirmed the purchase, but would not comment on the financial aspects of the deal. Siri describes itself as a voice-based personal assistant, that can “help you find and plan things to do,” such as finding a dinner spot, telling you what’s playing at a local music venue, or getting tickets to a movie. The company describes the service as “young” and says it “may be awkward at times,” but also says it “will improve quickly by getting to know you better and understanding a broader set of tasks.” The current version service, which is currently only available in the U.S., is built to run on the iPhone 3GS and iPod touch. The Siri Assistant app is available now as a free download from the App Store.