1. Excuse me, may I clear the dishes away?
Just be aware that some people might still be eating. Therefore it is best to ask
Excuse me, have you finished? ( hands indicating the dishes on the table. Usually they will know when you ask them this, that you are about to clear the dishes away )
2. Excuse me, would you like to order any drinks?
Excuse me, have you ordered any drinks?
3. Excuse me, would you like me to serve the desert now?
(1) May I take away your plates? Are you finished?
(2) Would you like coffee or tea? Could I get you some coffee or tea?
(3) Do you care for any desserts?
1. Have you finished? Shall I clear the table/this for you now? or you can say, 'Have you finished? Would you like me to clear this/the table for you?'
2. What drink would you like? Have you ordered your drink yet? or May I take your drink order?
3. Are you ready for your dessert? (more colloquial)
Shall/Can I serve the dessert now? or Would you like me to serve the dessert now?
(1) 我可以收拾你的碗筷嗎? = May I take away your tablewares?
(2) 請想叫甚麼餐飲? which dining drink would you prefer, tea or coffee?
或餐飲叫了沒有? Have you ordered dining drink yet?
(3) 及問他現在可以上甜品嗎? May I serve the dessert?