My homeowners only want the service done on a certain day. Can you do that?

We always try to comply with our customers request, and will schedule requested in-stallations for you on regular business days but we cannot guarantee service on any particular day in case we are met with unforeseen circumstances.
The homeowner wants you to call before you come. Can you do that?
Our policy is that our communications remains strictly with the agent. We ask that you relay to us any information that the homeowner has in regards to the post system.