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

[20, 5, 36, 24, 16, 27, 7, 18, 49, 11, 41, 29, 39, 37, 2, 6, 43, 40, 8, 3], target=38
[20, 18]