Please, thank you, and the basics of being polite.

• МолимMolimPlease / You're welcome (also 'pardon?' / 'go ahead')
• ХвалаHvalaThank you
• Хвала лепоHvala lepoThank you very much (lit. 'thank you nicely')
• Нема на чемуNema na čemuYou're welcome (lit. 'there's nothing to thank for')
• ИзвинитеIzviniteExcuse me / I'm sorry (formal, to get attention or apologize)
• ИзвиниIzviniSorry / Excuse me (informal)
• ОпроститеOprostiteForgive me / Excuse me (formal, sincere apology)
• ДаDaYes
• НеNeNo
• МожеMožeOK / Sure (lit. 'it's possible'; very common informal agreement)
• У редуU reduAll right / OK (lit. 'in order')
• ИзволитеIzvoliteHere you are / Go ahead / How can I help? (polite, formal)