Watch the Call & Response Soloing online guitar lesson by TrueFire from Play Jazz Guitar 1: Quick-Start for Beginners
A call and response lick or solo is very common in jazz. The basic concept of call and response is simple. The first lick or line is the "call" - to which there needs to be a "response". This is also a very cool way to help you develop soloing skills as it helps you know what you do next. If there was a call, then you need to respond. Makes a great way to build a solo!