Given the task definition and input, reply with output. 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

[38, 40, 43, 11, 37, 42, 33, 2, 14, 36, 49, 26, 7, 19, 32, 45, 10, 39, 29, 20], target=90

[]