I'm so tired ! I don't know how I'm going to make it through this lecture .   the professor is a bit boring today . You need something to perk yourself up . How about a coffee ?   I don't really like coffee , to be honest . It's too bitter for me .   well , you need something to wake you up . How about a soda ?   most some drinks have too much sugar in them .   the diet sodas don't have any caffeic in them , which one would you like ?   I like diet sprite . Does that have any caffeine in it ?   unfortunately , it doesn't . how about some diet coke ?   I don't care for coke . I heard that coke was first used as a medicine and I don't like medicine . What else has caffeine ?   maybe you should try a cappuccino or a latte ; they taste much better than plain brewed coffee .   maybe . How about a mochaccino ? Are they any good ?   you'll love that . It's just a shot of espresso beans mixed with steam milk and some chocolate syrup .   that's perfect ! Would you like one , too ? My treat .   thanks , but I'll stick with some jasmine tea . I'm trying to watch my diet . 