import re

file_path = 'server/src/app/services/user_agent_response.py'
with open(file_path, 'r', encoding='utf-8') as f:
    content = f.read()

content = re.sub(
    r'\s*"fallback_answer": fallback_answer,',
    '',
    content
)

with open(file_path, 'w', encoding='utf-8') as f:
    f.write(content)
print('Done.')