URI Redirect

I thought it would be simple, but i guess i am just too thick.

I need to have a redirect done, only if the URI does not contain a certain URI.

If the URI contains /vss-df,  or /vvs-df/appoitnment, etc then there is no redirect.  all other URI would redirect to the URL in the irule.

Do not redirect if the URI contains vvs-df

https://website/vvs-df,  https://website/vvs-df/appointments, etc

Direct:

https://website/,   https://website/

 if { ([HTTP::host] contains "<hostname>") }
        if { [HTTP::uri]] ne "/vvs-**") } {
        HTTP::redirect "<redirect URL>"
    }
}