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

[23, 31, 4, 40, 8, 2, 1, 19, 5, 26, 11, 9, 30, 12, 16, 35, 27, 29, 48, 25], target=18
[2, 16]