कोई बात नहीं koi baat nahi = No problem

" Koi Baat Nahi" - Can be used to Convey It's Fine For Eg. You Drop coffee on someone's shirt and U say I am so sorry. To be polite the other person might say "Koi Baat Nahi" meaning "It's fine" Also Used in a Sense of "Never mind" Suppose you were unable to clear an exam. When U apologize for ur inability to pass, your Father might say He Might say - Chalo Koi Baat Nahi, Agli baar zyada mehnat karna. (Never mind, Next time work harder) Hope it Helps :)

कोई बात नहीं( koi baat nahi)=it's fine

It's okay/ it's fine