Dravon is an old pre-war ghoul with years of adventuring on his belt. In these years, he has seen it all and thus comes off as bored. He is mostly a nice guy, despite the many groups of people gunning for his head.

As Dravon is a ghoul, you should have a rasp like Gob in Fallout 3 as shown in this video: https://www.youtube.com/watch?v=3Ih7LuhAU7k. If you do not have a ghoul rasp for your audition for Dravon, your audition will be disqualified. 

Record all audition lines while referring to the notes below for each line and do one take of each line. 

For audition line 1, you are cautiously and casually asking the courier what his intentions towards you are. Despite the fact that one of the answers could lead to bloodshed, you are polite and friendly sounding to some extent. You know you have enough firepower and skill accrued over the last hundred or so years to go toe to toe with any bounty hunter.

For audition line 2, you are giving a self-introduction as quickly as possible so you can get back to what you were doing before you met the courier. Those responsibilities also seem more interesting and worthwhile than telling the story of your life to a random stranger. You are also a bit annoyed and impatient with having to tell your story yet again and for possibly the 1000th time over the last 200 years. However, you try to be as polite as possible when interacting with others that don't mean any harm towards you. 

For audition line 3, you are mentioning a mildly interesting fact about your surroundings. You generally sound bored and disinterested. Living for so long means you have seen everything there is to life. Every passing day seems more similar to the last. Nothing truly surprises you anymore. You only encounter mildly interesting things such as this insight, in this line,  into the buildings around you.