What is how to respond when someone calls you an angel?

When someone calls you an angel, a polite response could be to thank them sincerely for their kind words. You could say something like "Thank you so much, that's very sweet of you to say." Alternatively, you could make a light-hearted joke, saying something like "I'm not sure I'm quite angelic, but I'll take the compliment!" Regardless of how you respond, it's important to be gracious and appreciate the compliment that you've been given.