You should be able to give off a fragrance of friendliness and display warm gestures. Make an eye contact with individuals often changing gazes. This instills a sense of direct communication with the audience making them feel important and more receptive towards you. Don’t stand at one place, unless you are being recorded by a camera; move frequently to create an aura of one on one basis interaction. Remember to never read your speech, instead tell them, and convince them! The difference between reading speech is that it will put the audience to sleep, and telling them something meaningfully will get them to support your view.
In the next paragraphs of your persuasive letter, build your case point by point. Expand on the claims you made in your introduction and back them up with evidence. Anticipate any objections Director Smythe might have to hiring you and respond to them: "My resume reflects that I was employed very briefly in my last position. This doesn't reflect dissatisfaction on either side; a family emergency forced me to move back to the Las Cruces area, and I have since transferred to NMSU, where I will complete my degree." Use a separate paragraph for each key point you make. Keep your tone confident and courteous.