I need a sound engineer in Berlin Messe

We have a small VIP Bar at an Event and need a minimal and budget friendly PA system for a DJ and 2 singer/songwriter bands. We need soundengineering when the band plays on Saturday 8th of July from 3pm till 5:30pm. The DJ plays during the day and is more background music than anything, the space is attached. We don't need anything big, just a Soundsystem and someone to help with the bands on Saturday.