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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def available(name):
    '''
    Check if a service is available on the system.

    Args:
        name (str): The name of the service to check

    Returns:
        bool: ``True`` if the service is available, ``False`` otherwise

    CLI Example:

    .. code-block:: bash

        salt '*' service.available <service name>
    '''
    for service in get_all():
        if name.lower() == service.lower():
            return True

    return False