In reflective writing the writer not only gives an account of an experience but examines what they thought and felt about it. Reflective writing should always convey the writer’s personality.
Concentrate on an event or feeling which has stuck in your mind - it doesn't have to be unusual or earth-shattering.
It could be an object that has significance for you, such as a favourite toy from childhood or an old piece of clothing. Alternatively it might be a recollection of a time you felt a powerful emotion, such as fear or pride.
These are much more interesting than long sections of description about minor details of a holiday. That is not to say that you cannot write about a holiday, but you should concentrate on the part of it that affected you. Readers are not likely to be interested in every detail.