This movie makes you think about the grind of everyday life and the moments in between which are sometimes filled with half-hearted conversations.
Its about loneliness, attachment and stupid ways we tend to hide our emotions. The ending perfectly depicts how we should let emotions take control sometimes and say things which need to be said.
I feel that this movie could be made more interesting but yeah maybe its meant to be this way. To put it simply, its just a glimpse into someone else's life.