we have tickets waiting for us
( we ( have ( tickets ( waiting ( for us ) ) ) ) )
(ROOT (S (NP (PRP we)) (VP (VBP have) (NP (NP (NNS tickets)) (VP (VBG waiting) (PP (IN for) (NP (PRP us))))))))
We have no tickets waiting for us.
( We ( ( have ( ( no tickets ) ( waiting ( for us ) ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (VBP have) (NP (NP (DT no) (NNS tickets)) (VP (VBG waiting) (PP (IN for) (NP (PRP us)))))) (. .)))