I'm very important, I am the superintendent of the royal warehouses.
Joao wanted to see if they could sail around the southernmost part of Africa. So he called in Dias.
I accept with all honor your grace.
Bartolomeu Dias was born in 1450, and was in the royal court of Joao the second, ( 1455 to 1495) of Portugal. He has most likely more sailing experience than told.
Bartolomew was summoned to the royal palace. The king told him of his ambitions, how he wanted to know about a legendary group of Christians called Prester John. He offered to pay for all the expenses. Obviously,Dias accepted.