If you are not familiar with reflexology, it can be compared to a foot massage. They are alike since both of these activities use the hands to apply pressure on the feet. With that said, the purpose of each is very different. 
Massage is intended to ease muscles that are sore and/or stiff. They are also useful when trying to get rid of stress. After working all week, a massage can be just what the doctor ordered. 
Reflexology has a different purpose. The point is to rid all energy blockages that are present in the reflexes of the foot. Reflexologists think each part of the foot corresponds to a different part of the body. These areas of the feet are known as reflexes. When pressure is placed on a reflex, it clears the blockages, puts the balance back in line and helps the corresponding body part or organ.
While massage is only centered on the muscles, reflexology is about restoring balance in the whole body. Both of these have their purpose and it is possible to have both done in one session. That would depend on whether the massage therapist happens to be skilled as a reflexologist. Try finding someone with both skills if you want to take care of everything all at once.