input: Write a function to create a simple chatbot using Python and state diagrams. The function should define various states, each with a message and possible replies that lead to other states. The function should also initialize the chatbot, handle user input, and manage the conversation flow until a terminal state is reached. If a user input does not match any reply, the chatbot should prompt the user to try again. Finally, the function should display the entire conversation at the end.
  assert create_chatbot() == None
output: def create_chatbot():
      states = {
          'start': {
              'message': 'Hello! Would you like to chat?',
              'replies': {
                  'yes': 'greeting',
                  'no': 'end'
              }
          },
          'greeting': {
              'message': 'Great! What is your name?',
              'replies': {
                  'name': 'name_response'
              }
          },
          'name_response': {
              'message': 'Nice to meet you, {name}! How can I help you today?',
              'replies': {
                  'help': 'help_response',
                  'bye': 'end'
              }
          },
          'help_response': {
              'message': 'I can help with many things. What do you need?',
              'replies': {
                  'info': 'info_response',
                  'support': 'support_response',
                  'bye': 'end'
              }
          },
          'info_response': {
              'message': 'Here is some information for you.',
              'replies': {
                  'thanks': 'end'
              }
          },
          'support_response': {
              'message': 'How can I support you?',
              'replies': {
                  'help': 'help_response',
                  'bye': 'end'
              }
          },
          'end': {
              'message': 'Goodbye!',
              'replies': {}
          }
      }
  
      current_state = 'start'
      conversation = []
  
      while current_state != 'end':
          state_info = states[current_state]
          message = state_info['message']
          if current_state == 'name_response':
              name = input(message.replace('{name}', ''))
              message = message.replace('{name}', name)
          else:
              print(message)
          conversation.append(message)
  
          if current_state == 'end':
              break
  
          valid_replies = state_info['replies'].keys()
          user_input = input('> ').lower()
          while user_input not in valid_replies:
              user_input = input('Invalid reply. Try again: ').lower()
  
          current_state = state_info['replies'][user_input]
  
      conversation.append(states['end']['message'])
      print('\n'.join(conversation))