input: Write a function to sort a given list of names alphabetically. The function should take a list of strings as input and return the sorted list.
  
  def sort_names(names):
      names.sort()
      return names
  
  assert sort_names(["John", "Harry", "Robert"]) == ["Harry", "John", "Robert"]
  assert sort_names(["Alice", "Bob", "Charlie"]) == ["Alice", "Bob", "Charlie"]
  assert sort_names([]) == []
  assert sort_names(["Zoe", "Yara", "Xander"]) == ["Xander", "Yara", "Zoe"]
output: def sort_names(names):
      names.sort()
      return names