Antifreeze drip

98 dodge grand caravan. For awhile I have a small drip coming from under the passenger side of the vehicle and yesterday as I was leaving work there was a large puddle under the passenger side and it was the antifreeze from the resevoir, I filled the resevoir and the radiator in order to get home. It did not do any dripping after that, but this morning I did notice a small wet spot under the same area, I drove it to work this morning, it has sat for about 4 hrs and still nothing dripping. Please help