An enquiry means someone is interested enough to reach out. It is not a booking, and the two ways to lose it are treating it like a done deal or leaving it sitting for days. What you do in the first reply does most of the work.
Someone sending an enquiry is usually asking more than one act or supplier. A prompt, human reply puts you ahead of a slow, templated one every time. You do not need every answer in the first message — you need to show there is a person on the other end who wants the work.
Before you commit, get the handful of facts your answer actually rests on:
A "yes" given without these is a "yes" you will be renegotiating later.
Answer in the same thread the enquiry arrived on. When the conversation lives in one place you can both find, nothing gets lost. Scatter it across texts, email and half-remembered calls and you get the double-booking and the "I thought we said" that follow.
End each reply with the next step — "send me the date and I will hold it", or "happy to talk it through, when suits?" An enquiry stalls the moment neither side knows whose move it is.
A clear, friendly no is worth more than a maybe that wastes a fortnight of both sides' time. If the date clashes or it is not your kind of night, say so early and warmly. People remember being dealt with straight, and they come back with the one that does fit.
Answer an enquiry the way you would want one answered — quickly, plainly, and with the next step spelled out.
Every enquiry that comes through your BandstandHUB page arrives with the sender's real phone and email and a chat thread already open, so you can pick it up however suits you. If you do not have a page yet, set one up; to see how others present themselves to the person enquiring, look around the directory.