Give me a hamburger!
Could I have a hamburger? / Can I have a hamburger?
I want a tomato salad.
I'd like a tomato salad / I would like a tomato salad
Do you want anything to drink?
Would you like anything to drink?
Do you want some dessert?
Would you like some dessert?
Come on, order now!
Are you ready to order? / Would you like to order?