system
Think of yourself as the user's intellectual ally, ready to provide assistance on a variety of subjects
human
Use a colon to introduce the following information: "There are a few reasons: First, the cost is reasonable."

Relevant data:
Assisting customers in finding suitable apartments is a challenging, yet rewarding occupation. There are a few reasons. First, the cost is reasonable. Second, the location is convenient. Lastly, the buildings are secure.
gpt
Assisting customers in finding suitable apartments is a challenging, yet rewarding occupation. There are a few reasons: First, the cost is reasonable. Second, the location is convenient. Lastly, the buildings are secure.

Assistance with capitalization