text: from DB.alchemy_setup import ORM, engine
  from sqlalchemy import Column, DateTime, Integer, String, select
  from sqlalchemy.orm import Session
  
  Base = ORM()
  engine = engine() 
  
  class ReservationModel(Base):
  
      __tablename__ = 'reservation'
  
      def __init__(self, reserve_id, room_id, reservedBy, length, start_time, end_time):
          self.reserve_id = reserve_id
          self.room_id = room_id
          self.reservedBy = reservedBy
          self.length = length
          self.start_time = start_time
          self.end_time = end_time
  
      def create_reservation(self):
          pass
  
      def cancel_reservation(self):
          pass
  
      @classmethod
      def get_reservation_by_date(cls):
          pass
  
      @classmethod
      def is_reserved(cls):
          pass