Case C-191/19: Judgment of the Court (Eighth Chamber) of 30 April 2020 (request for a preliminary ruling from the Landgericht Frankfurt am Main — Germany) — OI v Air Nostrum Líneas Aéreas del Mediterráneo SA (Reference for a preliminary ruling — Air transport — Regulation (EC) No 261/2004 — Compensation for air passengers in the event of denied boarding — Denied boarding — Cancellation — Connecting flights — Change of the reservation in respect of one of the flights comprising the journey by air against the passenger’s will — Arrival of the passenger without delay at his or her final destination)