<prompt> Translate the following text to EnglishKama A na A ni tofauti ya msingi kati ya huduma, mtu angetarajia tofauti ya kiwango cha wastani kulingana na tofauti halisi ya huduma.  <response>: First Class and Standard A, and if the fundamental distinction between the two was service, one would expect a moderate rate difference based on a real service difference. 