file_names = ['a.txt', 'b.txt', 'c.txt']
files = []
for file_name in file_names:
        with open(file_name, 'r') as file:
                files.append(file.readlines())

phrases={'hi':'hello','how are you?':'fine thanks','goodbye':'see you'}


def get_answer(key,phrases):
	return phrases.get(key)


def ask_user(phrases):
	while True:
		try:
			user_input=str(input('Введите сообщение:'))
			talk=get_answer(user_input,phrases)
			print(talk)
			if user_input=='goodbye':
				break 
		except KeyboardInterrupt:
			return "Уже уходите?"	
ask_user(phrases)