Havdalah from Shabbat to Chol HaMoed

Dear Rabbi, according to which text do we perform the havdalah separating the end of Shabbat (which this year coincided with the holiday of Passover) from Chol HaMoed Passover? It doesn't seem to be a separation between sacred and mundane. Also, are we entering the six days of labor, which this time are Chol HaMoed, which is in fact a holiday? Wishing you a happy Passover, Hallel.