Present Perfect / Present Perfect Continuous

Robin: I think the waiter (forget) us. We (wait) here for over half an hour and nobody (take) our order yet.

Michele: I think you're right. He (walk) by us at least twenty times. He probably thinks we (order, already) .

Robin: Look at that couple over there, they (be, only) here for five or ten minutes and they already have their food.

Michele: He must realize we (order, not) yet! We (sit) here for over half an hour staring at him.

Robin: I don't know if he (notice, even) us. He (run) from table to table taking orders and serving food.

Michele: That's true, and he (look, not) in our direction once.