You call to reserve if you want a table. If you walk in swinging your hands, you might not get a table. You might stand there, at a desk, as they look around trying to find a table for you. Eventually, they might say, sorry, no table.
You belong to the Winging Team, which isn’t a good team. Because they are busy serving halloumi tikka and peshawari kumbh and paneer tikka and platters of tikka and prawns. They are busy feeding Indian food lovers.