okay i guess we're on
( ( okay i ) ( guess ( we ( 're on ) ) ) )
(ROOT (S (NP (NNP okay) (NNP i)) (VP (VBP guess) (SBAR (S (NP (PRP we)) (VP (VBP 're) (PP (IN on))))))))
I think I'll have to cancel.
( I ( ( think ( I ( 'll ( have ( to cancel ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP think) (SBAR (S (NP (PRP I)) (VP (MD 'll) (VP (VB have) (S (VP (TO to) (VP (VB cancel))))))))) (. .)))