[
 {
    "date":"2018-04-01",
    "time":[{"10:00":"12"},{"12:00":"25"}]
 },
 {
    "date":"2018-04-02",
    "time":[{"10:00":"12"},{"12:00":"25"}]
 },
 {
    "date":"2018-04-03",
    "time":[{"10:00":"12"},{"12:00":"25"}]
 }
]

var slots = req.body.availableSlots;
        var count = slots.length;
        for(var i=0;i<count;i++){
            console.log(slots[i]);
            console.log(slots[i].date);
        }