There are different events to interact with twitter dialog for variaous actions like
twttr.events.bind(‘click’, clickEventToAnalytics);
twttr.events.bind(‘tweet’, tweetIntentToAnalytics);
twttr.events.bind(‘retweet’, retweetIntentToAnalytics);
twttr.events.bind(‘favorite’, favIntentToAnalytics);
twttr.events.bind(‘follow’, followIntentToAnalytics);
do we have any event to know that user has closed the dialog box without taking any action.