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

[35, 31, 33, 45, 20, 30, 17, 25, 18, 49, 10, 16, 8, 44, 48, 21, 37, 13, 5, 27], target=99
[]