To je hustý / To je cool! = That's cool.

I would say: Chceš jít na pivo? = How about having a beer? Jedno pivo, prosím! = One beer, please! Jsem unavený. = I am tired. Já jsem Dan a ty? = I am Dan, and you? Moc děkuji = thank you very much And then I would recommend you my website SlowCZECH with some "spoken" ideas: http://www.slowczech.com/tag/spoken/ :- ) Eliska