Input text in one column (a) if the value in another column (b) is found in another column (c)

I have two lists of people - they will not be sorted in the same order. The second list is in a different sheet. If the person listed in column A shows up in Column A in the second sheet, I want column F to display "Y." If not, I want column F to display "N."

This formula: =ArrayFormula(vlookup(A2:A,Attendees!A2:A,1,0)) almost gets me there, but I can't figure out how to get it to return Y/N instead of the name of the Attendee or not.

Any ideas?