input: 
  def chatbot_simulation(states: dict) -> None:
      """Simulate a simple chatbot using a state diagram, where each state
      is defined as a dictionary with keys 'name', 'message', and 'replies'.
      The chatbot starts at the state with the key 'state0' and continues
      based on user input until it reaches a terminal state (one with no replies).
      >>> chatbot_simulation({
      ... 'state0': {'name': 'state0', 'message': 'Hello! How can I help you?', 'replies': {'I need some advice': 'state1', 'Can you answer my questions?': 'state2'}},
      ... 'state1': {'name': 'state1', 'message': 'Sure, what kind of advice do you need?', 'replies': {'Career advice': 'state3','Health advice': 'state4'}},
      ... 'state2': {'name': 'state2', 'message': 'Yes, I'll do my best! What do you want to know?', 'replies': {'Where can I find good tutorials': 'state5', 'Why is coding so hard': 'state6'}},
      ... 'state3': {'name': 'state3', 'message': 'It is always a good idea to research the field you are interested in and creating a plan to learn the skills that are required. Make sure to contact professionals in the field to understand their experience.', 'replies': {}},
      ... 'state4': {'name': 'state4', 'message': 'Focus on eating healthy and staying active. Make sure to consult a medical professional if you have any concerns.', 'replies': {}},
      ... 'state5': {'name': 'state5', 'message': 'You can find tutorials online or join coding communities to get help from experienced coders. StackOverflow and Cod Academy are great resources.', 'replies': {}},
      ... 'state6': {'name': 'state6', 'message': 'Coding can be challenging, especially at first. Just remember that with practice, patience and problem solving skills you can overcome the obstacles.', 'replies': {}}
      ... })
      Conversation:
      Hello! How can I help you?
      >> I need some advice
      Sure, what kind of advice do you need?
      >> Career advice
      It is always a good idea to research the field you are interested in and creating a plan to learn the skills that are required. Make sure to contact professionals in the field to understand their experience.
      Goodbye!
      """
      current_state = states['state0']
      conversation = []
  
      while True:
          print(current_state['message'])
          conversation.append(current_state['message'])
  
          user_input = input('>> ')
          conversation.append(user_input)
  
          if user_input in current_state['replies']:
              current_state = states[current_state['replies'][user_input]]
          else:
              print("I don't understand what you mean. Please try again.")
  
          if not current_state['replies']:
              print('Goodbye!')
              break
  
      print("=========================")
      print("Conversation:")
      for message in conversation:
          print(message)
output:     current_state = states['state0']
      conversation = []
  
      while True:
          print(current_state['message'])
          conversation.append(current_state['message'])
  
          user_input = input('>> ')
          conversation.append(user_input)
  
          if user_input in current_state['replies']:
              current_state = states[current_state['replies'][user_input]]
          else:
              print("I don't understand what you mean. Please try again.")
  
          if not current_state['replies']:
              print('Goodbye!')
              break
  
      print("=========================")
      print("Conversation:")
      for message in conversation:
          print(message)