I can't think of anything, but it's been nice chatting with you.
( ( ( ( ( I ( ( ca n't ) ( think ( of anything ) ) ) ) , ) but ) ( it ( 's ( been ( nice ( chatting ( with you ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (PRP I)) (VP (MD ca) (RB n't) (VP (VB think) (PP (IN of) (NP (NN anything)))))) (, ,) (CC but) (S (NP (PRP it)) (VP (VBZ 's) (VP (VBN been) (ADJP (JJ nice) (S (VP (VBG chatting) (PP (IN with) (NP (PRP you))))))))) (. .)))
I don't want to talk to you any more. 
( I ( ( ( do n't ) ( want ( to ( ( talk ( to you ) ) ( any more ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP do) (RB n't) (VP (VB want) (S (VP (TO to) (VP (VB talk) (PP (TO to) (NP (PRP you))) (ADVP (DT any) (RBR more))))))) (. .)))