Answer: Disculpe, cuál es su nombre?
Step-by-step explanation:
You don’t have to necessarily say the disculpe, but it definitely makes you sound more formal. But of course, it depends on the situation. For example, if you haven’t started the conversation yet and you just simply want ask the name(s), it’ll be better to add the disculpe, but if you are already talking with someone, the disculpe will be a bit weird.