As a screenwriter definitely going to be involved in writing dialogue, you gotta have your character say something, but you got to do is make sure your characters are not talking like normal people, like people you can't stay, you know the ones that just go on about the weather and just say, you know, hey what you doing or am I doing too much Hey, what are you doing? You know, let's just use basically dialogue has to move the plot it has to show character and it has to be very efficient in conveying necessary information to get the story going. So write dialogue that is compressed and not the jibber jabber banter. You don't like to hear real life