You will be given a definition of a task first, then some input of the task.
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

[7, 14, 38, 46, 3, 39, 19, 21, 27, 29, 24, 45, 30, 35, 22, 43, 23, 2, 13, 18], target=86
Output:
[]