Do you want some dessert ?   No thanks . We just need our check . Have you seen the waitress ?   Oh , here comes our waitress with our check .   The service here has been really great , don't you think ?   Yes , the service was quite good .   So , let's look at the check . The total is $ 36.00 .   How much do you think we should leave for a tip ?   Usually people leave 15 % , but this was exceptional service . I am thinking that maybe 20 % would be appropriate . 