Every story has dialogue. Writers need to consider vocabulary and rhythm but don't forget the silences. Pauses in a conversation can serve many purposes. For instance...
A character has just said something shocking. There will always be a silence before any type of reaction is given.
A blind date will be filled with pauses in conversation. These pauses can be used to heighten the awkwardness of the situation, but can also be used to heighten the comedy.
Some people hate silences and will say anything to fill the void. This is a very useful tool if you write mysteries.
Just because there are no words being spoken, doesn't mean communication isn't continuing. Body language speaks loud and clear.
What isn't said is sometimes more important than what is.
When dealing with strong emotions, words are hard to come by. Let your characters be lost for words.
Sometimes, silence is golden. A well-placed pause can lift your dialogues off the page and make them real.
How often do you think about putting a pause into your dialogues?