This is a really common start to a job interview.

In fact I often use it myself.

Watch out though, it isn't as easy as it seems.

The problem is that it is totally unstructured and gives the interviewee no idea what the interviewer really wants by way of a reply.

But there is an answer and a best way to respond. Link a good story about yourself to a key element of what is  needed most for the role you are interviewing for.