How to know if the time of Start and End entered is already between another time of start and end in the database using node js

Question

The idea is that if a user wants to make a reservation, the time of start and end will not be accepted if it's already in the interval of another reservation.

The model:

import mongoose from 'mongoose'

const placeReservationSchema = mongoose.Schema({
    username: String,
    beginReservation: String,
    endReservation: String,
    namePlace: String
})
export default mongoose.model('placeReservation', placeReservationSchema)

The code :

function timeToNumber(timeString) {
  var hm = timeString.split(":");
  var hours = Number(hm[0]);
  hours = hours * 60 + Number(hm[1]);
  return hours;
}
function timeCompare(min, max, ref) {
  return (timeToNumber(min) <= timeToNumber(ref)) && (timeToNumber(ref) <= timeToNumber(max));
}
app.post('/users/reservationn',(req, res) => {
  let message = {}
  PlaceReservation.find({{ namePlace: req.body.namePlace}},(err, reservation)=>{
    if(err){
      res.status(500).json({success: false, message: err})
    }else{
      if(reservation){
        if(timeCompare(reservation.beginReservation, reservation.endReservation,req.body.beginReservation) === true){
          message.beginReservationM = 'BR_TAKEN'
        }
        if(timeCompare(reservation.beginReservation, reservation.endReservation,req.body.endReservation) === true){
          message.endReservationM = 'ER_TAKEN'
        }
        res.status(201).json({success :false, message: message})
      }else{
        const dbPlaceReservation = req.body
        PlaceReservation.create(dbPlaceReservation, (err,data)=>{
          if(err)
            res.status(500).json({success: false, message: err})
          else
            res.status(201).json({success: true, data: data, message: 'SUCCESSFULY_RESERVED'})     
          })
      }
    }
  })
})