Present Simple and Present Continuous
"Come on, let's order. The waitress comes / is coming.
The waitress is coming (present continuous)
" Kate doesn't want / isn't wanting to have dinner now. She isn't hungry."
"Kate doesn't want to have dinner now." (Present simple)
"The head chef is ill, so he doesn't work / isn't working today."
The head chef is ill, so he isn't working today (Present continuous)