If the flight in which you have reserved a seat is cancelled, you have the rights to reimbursement and compensation. However, you are not entitled to compensation if the incident occurs in extraordinary circumstances that could not have been avoided by taking all reasonable measures to prevent the cancellation. Such circumstances include poor weather conditions, political instability, strikes, security risks, and unexpected deficiencies in in-flight safety.
You are not entitled to compensation if you are informed of the cancellation: