In order to manage your orders, go into the "Transactions" section of the platform and press "Orders". There you'll have access to all the information about the different rental requests from your customers.
You'll notice that at the right side of the "Orders" you'll be able to check the status of each of the orders you've received. Here is a list of the different order status you'll come across along the rental process: https://help.gosharpei.com/en/articles/8886846-what-are-the-different-order-status.
If you click an Order, you'll see all the information about this one and then decide whether you want to Accept it or Decline it.
Watch this Video Demo of how to Accept or Decline your orders, it includes some tips and tricks: