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

• RahmatThank you (standard, common)
• Katta rahmatThank you very much (lit. 'big thanks')
• IltimosPlease (when requesting something)
• MarhamatPlease / Here you are / Go ahead (offering or inviting; very polite)
• KechirasizExcuse me / Sorry (polite; to get attention or apologize)
• KechiringSorry / Forgive me (polite apology imperative)
• ArzimaydiYou're welcome / Don't mention it (reply to thanks)
• HaYes
• YoʻqNo
• MayliOkay / Alright / Fine (agreement)
• YaxshiGood / Okay (also 'fine, well')
• XoʻpOkay / Alright (agreement, slightly informal)