The balcony scene is an extended exploration of character; Romeo and Juliet are in love with each other by this point, but their love is based on looks alone.  Every reference each has made to the other prior to the balcony scene uses imagery of sight (Juliet, especially is compared to white birds, glowing lights, stars).  During their hours on the balcony, Juliet frets that she has been too "forward," and she worries that Romeo will think less of her for it.  When she attempts to leave the balcony in response to her nurse's call, Romeo asks "Would thou leave me so unsatisfied?", to which Juliet asks "What satisfaction could thou have tonight?"  She refuses to have any physical relations with him (such as kissing him good night) until he promises that his intentions are true, and that his purpose is marriage to her.

Sure, but what information are you looking for? They are talking to each other in that scene.

For the scene with a parallel delivery in modern English, see this section of the enotes study guide:
http://www.enotes.com/romeo-text/3380

For an analysis of the scene, see this section of the enotes study guide:
http://www.enotes.com/romeo/34521

For an essay on the scene, see this section of the enotes study guide:http://www.enotes.com/romeo/753