Can I have 2 recipient signers but only 1 is required?

I am setting up a workflow:

Rep (Sender/Signer) --> Customer (Signer) --> Manager or assistant manager (Signer) --> Admin (Acceptor)

The document goes to 2 receipients - a manager and assistant manager - for signing but only 1 of the 2 needs to sign, due to their availability.  How can I set this up?

Product:  Adobe Sign Enterprise