Do Conferences provide the facility of pre-submission inquiries?
For some conferences the Program Chair might respond to an email enquiry. In others, perhaps not. 

But there is no reason that you can't just submit your paper. If it is inappropriate in any way, you will be told as part of the review process. Don't waste people's time with something obviously off-topic, but otherwise just do it. 

If a PC does respond to an enquiry it would likely be something like the above paragraph. Note that deadlines are pretty firm because of the limited time prior to the conference itself, though some conferences also extend deadlines when they don't get sufficient papers.