input: Write a function to sort a given list of names alphabetically.
  
  def sort_names(names):
      names.sort()
      return names
  
  assert sort_names(["John", "Harry", "Robert"]) == ["Harry", "John", "Robert"]
  assert sort_names([]) == []
  assert sort_names(["Alice"]) == ["Alice"]
  assert sort_names(["Zoe", "Bob"]) == ["Bob", "Zoe"]
  assert sort_names(["Eve", "Dave", "Charlie"]) == ["Charlie", "Dave", "Eve"]
output: def sort_names(names):
      names.sort()
      return names