Can you talk to the galaxy s3 like the iPhone?

Not like when your set your alarm just ask questions in general?

Yes, you can. Where iPhone has Siri, the galaxy S3 has "S-Voice". S-Voice provides the same services as Siri: it searches the web, gives the weather forecast, and can even give you directions. If you would like to see a demo, here is a link to a YouTube video pitting Siri against S-Voice.

Yes it's just like siri but called s-voice