code: def _serialize_conversation(conversation: Dict[str, str]) -> str:
      conversation_as_list = []
  
      for speaker, message in conversation.items():
          conversation_as_list.append(f"{speaker}: {message}")
  
      return "\n\n".join(conversation_as_list)
  
imports: import copy
  import random
  from dataclasses import dataclass
  from enum import Enum
  from typing import Dict, List, Literal, Optional, Sequence
label_desc: Use image node_id 6 for calling a global function with example usage: _serialize_conversation(conversation) and returns: str