hai kaa. bantu aku untuk pr bsk. Make a sentence offering help with response (accepting and reducing) a)formal b)informal c)Neutral

a ) Formal 
Excuse me sir, may I help you? > Oh, sure. Thanks a lot
                                                     > Oh, no thank you. I think I can do it my self
b) Informal 
Do you need a help? > Yeah, thanks.
                                  > No, I don't
c) Neutral
-sorry I can't help you-