I think this is it, Morning Glory. I did not exactly plant it, neither bought it. Either the bird or the bee or maybe the wind, took the seed and blew it to our garden and it grew. It likely came from the roof garden right above our unit. I know they have them up there.
Morning Glory has more than 1000 species and I am quite sure, this is one of them. The flowers blossom in the morning and die in the afternoon, but I always see some flowers open up every morning. Loving it!