However, if you see your marital status as a part of your identity, you can use ser (e.g., soy soltero… casado… divorciado… viudo). People will argue over which is more proper in this case, ser or estar; I think using … Second usage is adjectival, as in una madre soltera. A single mother. So I still suggest respectfully that it would be helpful to translate the word in this dialogue as a noun. Otherwise, I believe, the question might have been ¿Estás soltero? …