make a conversation with my friend !!!

A: You can do it..
B: no, i cant do it..
A: ..so... dont do anything!
B: but i want to do it..
A: why do y say that y cant do it? y should do it, and know how can y do it.
B..but.. i cant do it!~!
A: my god.. please ... say anything different "y cant do it! "
B: oh.. so sorry!!! ....i cant do it.
A: .... and what's?
B : uhm hum... so... i cant do anything.
A: okey.. okey.. i know, i see....anyway!!! y want to do it but y cant do anything, so what can i help y ?
B: y can do it for me?
A: but.. what can i do ?
B: i dont know..
A: .....