I would suggest that you need to engage the person with a series of questions in order to build raport and tell them about our services, rather than give an quick hourly rate reply;
certainly sir/madam, in order to give you an accurate quotation i just need to run through a couple of details;
1. Name
2.hours etc
3.weekly/montly
4,materials
5,6,7...........
8. where did you get our number from.
9 address of site.
10.and is that your home address (

)
Do this in a friendly way to build a raport, engage the customer by expanding on their answers and add relevant comments eg, oh thats good,yes, we offer that/can do that, or,oh its only round the corner from us so that will work well etc............
at the end do a recap;
so your looking for, x hours with two cleaners fortnightly etc................ Is that correct? (they gave the information so it will be). Now it depends what the next stage is, do you want to close the business or are you trying to make an appointment to see them?
appointment;
so your looking for , x hours with two cleaners fortnightly etc, etc,etc. The price including all materials and v.a.t will be £50 per week, (dont pause) this can be paid cash weekly, direct debit or montly (etc), the only thing left to do is to make an appointment to come and see you, what day suits you best? (dont say anything) ....then Book appointment for that day...........!
Close sale;
so your looking for , x hours with two cleaners fortnightly etc the incusive price from us will be £50 per week, (no pause) this can be cash weekly, direct debit or montly (etc), which would suit you best? (dont say anything)..... ok, i can set that up now for you.....!
note: after asking the what suits you best? (assumptive close) you must not be first to speak, they may well take a few seconds to answer, but alot of the time it will be the answer you want to hear.
You obviously need to tailor your call to meet your service but prepare a list of your questions you can even make it into an enquiry form for your own records, you can then follow them up later in the week. use the same method with every enquiry as it will take practice use a script to guide you so that you can ask your questions exactly as they need to be asked, dont do the reading off cards thing tho', it needs to be a personal one to one,so practice!.
All the effort you put in before the call will make it smoother, easier, more relaxed and get you the best result and as mentioned by someone else, have complete confidence in your service and assume everyone will want it.
hth,
steve