We need to talk to FAA.
( We ( ( need ( to ( talk ( to FAA ) ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (VBP need) (S (VP (TO to) (VP (VB talk) (PP (TO to) (NP (NNP FAA))))))) (. .)))
We don't need to speak with FAA.
( We ( ( ( do n't ) ( need ( to ( speak ( with FAA ) ) ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (VBP do) (RB n't) (VP (VB need) (S (VP (TO to) (VP (VB speak) (PP (IN with) (NP (NNP FAA)))))))) (. .)))