code: func (r *EchoRequest) GetSlot(slotName string) (EchoSlot, error) {
  	if _, ok := r.Request.Intent.Slots[slotName]; ok {
  		return r.Request.Intent.Slots[slotName], nil
  	}
  
  	return EchoSlot{}, errors.New("slot name not found")
  }
docs: // GetSlot will return an EchoSlot from the EchoRequest with the given name.