"Pharser" isn't a word, at least not in English. The first time I read it, I thought you meant "phaser", as in the energy weapons used in Star Trek, and thought you were trying to make a joke about how you wanted to respond to badly typed messages.
But, I think you mean "parser", as in code that parses the text to look for certain words in messages. In that case, I have to second Duugu's request for more information, as your post doesn't really make it clear at all what you want to do. There are already a number of addons that save conversations or automatically respond to certain messages. If none of them do what you want, you're going to have to be more specific about what you do want.