Customer Support (residing in US)

I need a part-time assistant to call customers and send follow-up emails. I will tell you exactly what to say and email. Both calling and email need to be very professional. You will be calling people who are at a high level in Fortune 1000 type companies. Your English needs to be very good. The customers are in the United States so I only want people residing in the 48 contiguous US states. The amount of time is small. I would say 1/2 an hour or 1 hour per day. This may increase over time. If I see that you are capable of doing more, I can also increase the tasks.