For calls at work I answer using a simple script: "[business name], [my full name] speaking. How may I help you?" And though this might sound strange, I also make a point to smile while I talk to people on the phone. They can't see it, but it does subtly change the inflection of your voice and registers with people subconciously. Beyond that a lot of scripting is specific to the job.
At one point I was doing a practicum at an orthopedist's office. One of my jobs was calling people to inform them that their orthotics were ready for pickup. My script looked something like this. "This is [name] calling from Dr. __________s office. I would just like to inform you that your orthotics are ready for pickup. You may stop by any time between 8:00am and 4:30pm, monday to friday. Thank you, and have a great day."
That script is tailored more toward answering machine, but it serves well in conversation as well if you break it down into individual sentences. For example:
Client: "Hello?"
Me: Hi, this is [name] calling from Dr. ___________s office. I would just like to inform you that your orthotics are ready for pickup.
Client: Oh, so when do I have to come in?
Me: You may stop by any time between 8:00am and 4:30pm, monday to friday.
Client: Okay, sounds good.
Me: If you have any questions or concerns please contact us ###-####.
Client: Yeah, allright. Bye.
Me: Thank you, and have a great day. *click*
Often conversations are a little more complicated than that. You have to repeat information, answer unexpected questions, or utilise your script out of order. However, using a script as a basis makes things much simpler. Also; having a variety of scripted responses to different types of questions goes a long way. Often the same form can be used for a variety of differnt situations with the pertanent information simply inserted into the blanks.