If you didn't understand Sonia's explanation, she said that Cuál es tu nombre? OR Cómo TE llamaS? (not se llama unless you're trying to use formal Spanish) These two expressions are the most common to ask for someone's name. As an addendum, you could say like como se llama...esa cosa que se usa para comer sopa? = How do you call that thing that you use to eat soup? The answer? La respuesta? Cuchara. Spoon.