You CAN get to IPA through the SOS button, but the Infiniti Connection people, as well as your fellow users, would prefer you not do it that way. SOS gets you directly to an emergency dispatch person. They can re-route you to IPA, but there's a better way.
Just press the headphone icon on your navigation screen. This will take you to an interactive voice response that is the same call center. When it answers, just say "Infiniti Personal Assistant". That's the preferred way for you to reach an IPA person.
Ask your assistant to help you plan a party (seriously, they'll do that). Or order flowers for your wife. Or find you the nearest In n Out burger. Or the cheapest gas station in the next 30 miles. Or how to use XYZ feature on your JX. If you're using them to help find something, they can download the address to your navi screen when they hang up (let them hang up the call for this feature to work).