def cli(env, identifier):
    """Cancel virtual servers."""

    vsi = SoftLayer.VSManager(env.client)
    vs_id = helpers.resolve_id(vsi.resolve_ids, identifier, 'VS')
    if not (env.skip_confirmations or formatting.no_going_back(vs_id)):
        raise exceptions.CLIAbort('Aborted')

    vsi.cancel_instance(vs_id)