Many people say that there is no self or that the self is really part of a larger system and that the self that we identify ourselves as is not really ourselves, but the self that appears most commonly across situations we encounter, but I am going to refute this with a simple analogy.
Take the element hydrogen as an example. It does not always appear as hydrogen. It will appear differently based on the elements it is surrounded by and the conditions placed on it. When surrounded by oxygen it becomes water, when surrounded by Nitrogen it becomes ammonia, and when surrounded by oxygen and frozen it becomes ice.
Similarly, people take on different selves based on their surrounding. They can behave one way around work, one way while amongst a group of strangers, and then another when at home. However, to say there is no true self may be similar to saying there is no true hydrogen, which does not entirely make sense since we can observe hydrogen and predict its behavior in an obvious way.