Virtual Assistant during US business hours (9am-5pm CST)

I'm looking for a Virtual Assistant to join my team! My company needs help mostly during US business hours (9am-5pm CST). Specifically, I'm looking for someone to help with customer service-oriented tasks. The Virtual Assistant should be available at a specific time of day - preferably in the middle of the workday. If hired, I will need these services for a minimum of one month. If the Virtual Assistant proves to be a good fit for the team, then the position may become long-term.

Must have good English.