@Mike-And-Chantal0 No, it is not correct.
What you most likely have here is a high-maintenance guest looking to take advantage of the fact that you're a new host. We all know the type. If you accept the booking, they'll start demanding more and more unadvertised features after check-in, at your own expense, and if you don't yield, they use spurious complaints in pursuit of a deeply discounted or even free stay. The cherry on top will be a whiny review that makes it hard to attract further bookings.
A sensible guest would choose a listing that suits their needs in its present state, not demand upgrades before they've even shown up. This request should go directly into the garbage.
Your listing offers Wi-Fi with continuous access throughout the building, so as long is this is accurate, it's all you're obliged to provide. If guests ask, you may disclose the connection speed as a reference point, or mention how often your area experiences service interruptions (if any). Guests with concerns about limitations may, of course, supply their own mobile hotspots.
It's rare for a home to be fully formed on its first booking, so you will probably find yourself making some upgrades based on guest feedback. But I only recommend doing this when you're confident that they are worthwhile long-term investments, and never on command.
