Before Sunrise
(1995)

Jesse (Ethan Hawke) and Celine (Julie Delpy), meet each other in a train. After their brief meeting, they wonder what would have happened if they've had more time avaliable and decide to take the chance and spend one night together in Vienna speaking about them and their future and taking us to a trip into the city. When the morning comes they aim to the train station where Celine must pick her train and agree to meet there again in six months.

Thanks Templar!