Undergraduate / "experienced gained from working as a bank teller" - Common App Extracurricular [3]

This is the prompt: Please briefly elaborate on one of your extracurricular activities or work experiences in the space below (150 words or fewer, 1000 character maximum).

I decided to elaborate on my experience working as a bank teller.
Please critique it. I wont be offended if you are harsh. If you help me, I will help you. THANKS in advance.

"What do you mean I have a late charge on my mortgage!? I paid my mortgage two weeks ago, young man! So don't tell me what I need to do!"

This is the type of customer dissatisfaction that I regularly deal with working as a bank teller. How I chose to mitigate the situation and rectify the problem is essential. I have realized that if I answer calmly and retain my composure, then that same attitude will transfer onto the customer and the problem would be solved. Against this background, I have realized that interpersonal skills are essential for success not only in a bank setting but also everywhere I go. Likewise, success in this world often depends on the relationships that we develop with others. My experience as a bank teller has fostered my social skills that I will utilize in my future career as a physical therapist.

It is 149 words by the way.