Feedback training does not change confidence

[Piero24]

import logging
from chatterbot import ChatBot
from chatterbot.trainers import ListTrainer
from chatterbot.conversation import Statement
from chatterbot.trainers import ChatterBotCorpusTrainer
Uncomment the following line to enable verbose logging
logging.basicConfig(level=logging.INFO)

yes_resp = ["yes", "y"]
no_resp = ["no", "n"]

def get_feedback():

    text = input()

    if text.lower() in yes_resp:
        return True

    elif text.lower() in no_resp:
        return False

    else:
        print('Only "Yes" or "No"')
        return get_feedback()


bot = ChatBot(
    'Bot',
    storage_adapter='chatterbot.storage.SQLStorageAdapter',
    logic_adapters=[
        {
            'import_path': 'chatterbot.logic.BestMatch',
        }
    ],
    input_adapter='chatterbot.input.TerminalAdapter',
    output_adapter='chatterbot.output.TerminalAdapter',
    database_uri='sqlite:///database.db'
    )

trainer = ChatterBotCorpusTrainer(bot)
trainer.train("./my_own.yml")

print('Type something to begin...')

while True:

    try:

        input_statement = Statement(text="How are you?")
        response = bot.generate_response(input_statement)
        print("\nConfidence: " + str(response.confidence))
        print('"{}" It is correct "{}"?'.format(response.text, input_statement.text))

        if response.text != "fine":

            correct_response = Statement(text="fine")
            bot.learn_response(correct_response, input_statement)

        else:
            break

    # Press ctrl-c or ctrl-d on the keyboard to exit
    except (KeyboardInterrupt, EOFError, SystemExit):
        print("Arrivederci")
        break

I am trying to use feedback training but I have noticed that when I enter information via input the confidence is not changed and the new answer is not entered in the database.

I tried to do this cycle to see if with many more answers this was inserted in the database but it doesn't happen.

Where am I doing wrong?
Is there a way to manually change the confidense?

Thanks everyone in advance