POSH to check specific services for a list of servers

I need a script that would check for a list of services listed in a txt file for a list of servers in a txt file.  

I have several servers that I would like to check to see if certain services are running on them.  If the service does not exist on that server I would like the script to keep going and report nothing for that service.  

For example in my environment a sql server would not have IIS running on it, but a web server would.  So for the sql server I would like for the result set to return nothing for IIS, but the status obviously for the web server.

I then need the result set exported to a CSV file in the following format:

ServerName, ServiceName, CurrentState