OK, I thought so.
( OK ( , ( I ( ( thought so ) . ) ) ) )
(ROOT (S (INTJ (UH OK)) (, ,) (NP (PRP I)) (VP (VBD thought) (ADVP (RB so))) (. .)))
Ah yes, I suspected that was the case. 
( Ah ( yes ( , ( I ( ( suspected ( that ( was ( the case ) ) ) ) . ) ) ) ) )
(ROOT (S (INTJ (UH Ah)) (INTJ (UH yes)) (, ,) (NP (PRP I)) (VP (VBD suspected) (SBAR (IN that) (S (VP (VBD was) (NP (DT the) (NN case)))))) (. .)))