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Explanation: This kind of responses are highly formulaic in each language. I exclude that you would translate it with the second person singular in Italian (tu, which is less formal, and is predicated on close acquaintance and other sociolinguistic factors) considering that is a very formal response.
And I translated it, non literally, with the slightly more formal response you would use in Italian.
paola l m
p.s. also if you want to know more you should give us the entire sentence and a sense of the context.