Being prepared not only allows you to stick to the script, but it also affords you the ability to go off script too! Sometimes as a comedian, you have to respond to something that happened in the moment - someone in the front row has an obnoxious laugh, someone in the back shouts something out, a drink is spilled, the mic cuts out - Preparation allows you to respond to these things, which builds a stronger connection between performer and audience - or in your case between president and chapter.