okay and and i think we just hang up i don't think we have to do anything else
( ( ( okay ( ( and and ) i ) ) ( think ( we ( just ( ( hang up ) i ) ) ) ) ) ( ( do n't ) ( think ( we ( have ( to ( do ( anything else ) ) ) ) ) ) ) )
(ROOT (S (NP (NP (NN okay) (CC and) (CC and) (NN i)) (SBAR (S (VP (VBP think) (S (NP (PRP we)) (VP (ADVP (RB just)) (VB hang) (PRT (RP up)) (NP (FW i)))))))) (VP (VBP do) (RB n't) (VP (VB think) (SBAR (S (NP (PRP we)) (VP (VBP have) (S (VP (TO to) (VP (VB do) (S (NP (NN anything)) (ADJP (RB else)))))))))))))
We don't have to do anything else but put the phone down, I think. 
( ( We ( ( ( ( do n't ) ( have ( to ( do ( anything else ) ) ) ) ) but ) ( ( put ( the phone ) ) down ) ) ) ( , ( I ( think . ) ) ) )
(ROOT (S (S (NP (PRP We)) (VP (VP (VBP do) (RB n't) (VP (VB have) (S (VP (TO to) (VP (VB do) (S (NP (NN anything)) (ADJP (RB else)))))))) (CC but) (VP (VBP put) (NP (DT the) (NN phone)) (PRT (RP down))))) (, ,) (NP (PRP I)) (VP (VBP think)) (. .)))