USA resident to asnwer a few forwarded calls each month

I am looking for a personal assistant in USA with an American accent that can have my personal US phone number forwarded to his or her cell phone. My US phone number is only for listings in case someone from United States needs to get in touch with me, but it very rarely receives any calls. If we say 5 calls each month we are on the safe side, I expect less. When you received a forwarded call you will see my US number on your caller ID, so you will be able to separate them from your personal calls. So when a call is made to my US number you need to answer as my personal assistant and take a message. The message you can send me on email or call if it’s something urgent. I am looking for someone who is available on his or her cell most of the day, and that can answer these very few calls for a FIXED monthly price.