The flipping obvious observation that seems to have been missed so far is that there are different levels of "coldness" to an enquiry that comes in over the phone.
The enquiry could be somebody making multiple enquiries following a Google Search or going through all the CCs advertising in YP
It could be a repeat client from some years ago checking to see what the price has gone up to
It could be a referral from a neighbour of a client of yours who has recently had their suite cleaned and has shared the price
It could be a recommendation from an "introducer" eg a carpet shop, a property maintenance company or other such introducer
Each of those will have different issues to address and your ability to tailor your replies to their enquiry will have much more influence on whether they book in or simply buy on price.
As has been stated on the forum so many other times, your ability to sell with confidence at a higher price than you are used to selling at will make all the difference.
Sure I'm only selling at £110-£120 but with VAT still means that the client has to shell out between £132 and £144 but I won't be sharing with you how I do that. But as Doug has already said, if you're busy and confident you go with the flow of some you book in, some you won't and you'll possibly only find out once you've done the job that you were pushing against an open door when you were "selling" your pricing, or instead if it was your natural, amazing, ability to convert a truly "cold" call into a booking.
Rog