Zoho Form Auto Fill

Zoho Form Auto Fill

I am setting up a Zoho form for my independent sales reps to request quotes. Their names are in the first field under a dropdown menu. The next field is their email address. I want the email address field to automatically be filled in when they select their name from the first field. I currently have a Zoho Table with their names and corresponding email addresses. I also have an Airtable database as an option to use. I want to keep the reps' names and email addresses separate from my CRM database. What is the easiest way to do this auto-fill?