input: Write a function to create a simple chatbot using Python and state diagrams. The chatbot should initialize with the state0 and guide the user through a conversation based on predefined states and their corresponding messages and replies. If the user input matches a predefined reply, the chatbot should move to the corresponding state. If the user input does not match any predefined reply, the chatbot should prompt the user to try again. The conversation should end when the chatbot reaches a terminal state. The function should return the entire conversation history.
  states = [
   {
   'name': 'state0',
   'message': 'Hello! How can I help you?',
   'replies': {'I need some advice': 'state1', 'Can you answer my questions?': 'state2'}
   },
   {
   'name': 'state1',
   'message': 'Sure, what kind of advice do you need?',
   'replies': {'Career advice': 'state3','Health advice': 'state4'}
   },
   {
   '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'}
   },
   {
   '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': {}
   },
   {
   'name': 'state4',
   'message': 'Focus on eating healthy and staying active. Make sure to consult a medical professional if you have any concerns.',
   'replies': {}
   },
   {
   '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': {}
   },
   {
   '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': {}
   }
  ]
  
  assert chatbot(states) == [
      '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!'
  ]
  
  assert chatbot(states) == [
      'Hello! How can I help you?',
      'Can you answer my questions?',
      'Yes, I'll do my best! What do you want to know?',
      'Why is coding so hard',
      'Coding can be challenging, especially at first. Just remember that with practice, patience and problem solving skills you can overcome the obstacles.',
      'Goodbye!'
  ]
  
  assert chatbot(states) == [
      'Hello! How can I help you?',
      'I need some advice',
      'Sure, what kind of advice do you need?',
      'Health advice',
      'Focus on eating healthy and staying active. Make sure to consult a medical professional if you have any concerns.',
      'Goodbye!'
  ]
  
  assert chatbot(states) == [
      'Hello! How can I help you?',
      'Can you answer my questions?',
      'Yes, I'll do my best! What do you want to know?',
      'Where can I find good tutorials',
      'You can find tutorials online or join coding communities to get help from experienced coders. StackOverflow and Cod Academy are great resources.',
      'Goodbye!'
  ]
output: def chatbot(states):
      conversation = []
      current_state = 'state0'
      while True:
          state = next(s for s in states if s['name'] == current_state)
          conversation.append(state['message'])
          if not state['replies']:
              conversation.append('Goodbye!')
              break
          user_input = input(state['message'] + ' ')
          conversation.append(user_input)
          if user_input in state['replies']:
              current_state = state['replies'][user_input]
          else:
              conversation.append("Sorry, I didn't understand that. Please try again.")
      return conversation