How do I make a soap call that filters on a boolean?

I’m attempting to search for customers with isPerson=false. I have searched a lot of documentation and tried a few things. At this point, I think I’m close but I need some assistance to get my soap request working:

<soapenv:Envelope

    xmlns:xsd='http://www.w3.org/2001/XMLSchema'

    xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'

    xmlns:soapenv='http://schemas.xmlsoap.org/soap/envelope/'

    xmlns:platformCore='urn:core_2019_2.platform.webservices.netsuite.com'

    xmlns:listRel='urn:relationships_2019_2.lists.webservices.netsuite.com'

    xmlns:platformMsgs='urn:messages_2019_2.platform.webservices.netsuite.com'>

    <soapenv:Header>

        <tokenPassport xsi:type='platformCore:TokenPassport'>

            <account xsi:type='xsd:string'>{{account}}</account>