Create event

I'm assuming you want to allow the email address to have multiple items? If so, you can use a!forEach() to create a list of multiple items like this:

attendees: a!forEach(
  items: ri!emailAddress,
  expression: {
    emailAddress: {
      address: fv!item,
      name: index(ri!emailAddress, fv!index, "")
    }
  }
)

The a!forEach() function iterates over a list of values, so you can use fv!item to reference the value of the email address. However, since your name is in a separate variable, you have to use the index function to find the item at the corresponding index in that list. You can find more information about this function here.