You are given a list of integers and an integer target, return a list of a pair of numbers in any order such that they add up to target. If there is no such pair of numbers, then return an empty list

[44, 15, 35, 40, 16, 48, 21, 8, 27, 30, 41, 14, 11, 33, 13, 24, 7, 22, 9, 47], target=12
[]

[39, 30, 17, 47, 19, 23, 44, 5, 20, 1, 8, 42, 48, 11, 34, 6, 26, 13, 18, 4], target=43
[23, 20]

[35, 41, 6, 12, 18, 23, 2, 21, 46, 25, 5, 40, 48, 43, 49, 20, 26, 30, 27, 17], target=19

[2, 17]