In this script:

Replace '[email protected]' and 'your_password' with your Gmail account credentials.
Configure the email sender and recipient addresses.
Define the get_flight_price() function to fetch the current flight price from your data source (web scraping, API, etc.). For this example, we simulate it with a hardcoded value.
Set the threshold_price variable to the price below which you want to receive alerts.
The script continuously checks the flight price, and if it falls below the threshold, it sends an email notification using the Gmail SMTP server.
It sleeps for a specified interval (in this case, 1 hour) before checking again.