As you are using form submission to contact sales rep at a point of time you should use transaction integration. i.e.
1. Enable transaction id recording in adobe.
Go to Admin > Report Suites > [Select Report Suite] > Edit Settings > General > General Account Settings.
To see if Transaction ID Recording is enabled, navigate to Analytics > Admin > Data Sources.
More Details: Add offline data | Transaction and customer integration
2. Set transactionID tracking at the same time user submit sales form.
3. Upload transaction id dimension and metrics. How see here : Transaction ID
Note: There will be additional fee to use a transaction id table and you have 90 days data to upload offline data after setting transaction Id) which can be extended with additional cost.
Thanks,
Asheesh