Hacker15e
Who am I? Where are my pants?
How do you respond to the “I’m good enough to fly their express/connection passengers, but not mainline.”
I mean from a purely customer service standpoint, they got a point.
Tell them that when they are in charge of hiring at mainline, they can take that into consideration. Until then, it is the airline's pilot hiring office that makes the requirements and up to applicants to meet those requirements.