grammar - What's the meaning of "should we be interested"?

I contacted someone and he replied:

...

I've passed your information along and someone will get back to you should we be interested.

After sending him another message he replied:

...

... will return should we be interested.

Is this a question?

I've passed your information along and someone will get back to you. Should we be interested?.

What do I have to reply? What's the meaning of this expression?