Robin:  I think the waiter (forget)  has forgot  us. We (wait)  have been waiting  here for over half an hour and nobody (take)  has taken  our order yet. 
Michele:  I think you're right. He (walk)  has walked  by us at least twenty times. He probably thinks we (order, already)  have already ordered. 
Robin:  Look at that couple over there, they (be, only)  have only been  here for five or ten minutes and they already have their food. 
Michele:  He must realize we (order, not)  have not ordered  yet! We (sit)  have been sitting  here for over half an hour staring at him. 
Robin:  I don't know if he (notice, even)  has even noticed  us. He (run)  has been running  from table to table taking orders and serving food. 
Michele:  That's true, and he (look, not)  has not looked  in our direction once.