ERD for database design

hello guys i need to make an ERD Diagram for the following scenario

a sales person receives orders by phone from clients for equipment his company leases 
the sales person places the order in the system
the store keeper sees the order using the system prepares it and delivers it
after the client is ready the store man picks up the equipment and renters the products to the stores and re enters the products in the system 
there is also an accountant that can cross check payments he receives accessing the system.

can some one help please