How many types of lying? To fulfill a lie:

The statement must be untrue.
There must be an intention to deceive.
An effort must be made to deceive.
The other person understands the meaning.

One person says something he didn't intend to do. Realizing what he said was not truly right, he did what he said in order to fulfill what he has said. An example, someone was given a pamphlet and says "will check it later", do not want to be a liar, he check it later although he doesn't want to check it in order to fulfill what he already said.

If he just said without doing it, that is a lie. But what if do it later, will the lie cancelled?
As I understand Right Speech, the relationship between what one thinks and what one says makes the difference between a truth and a lie. 

In your example, if the person says something and know that thing to be  untrue when he says it, that person just said a lie. The intention that person said the lie might not be completely unwholesome (maybe he didn't want to offend the other person etc), but nevertheless, he still is sure of not being honest to the other person and can be sure of just having done an unwholesome act. It seems to me ( but I am not completely sure about it) that the reason that person does read the pamphlet has more to do with his ego of not wanting to be considered a liar (even if only in his own eyes).

The bottom line is that all that matter is what person thinks at the moment that he speaks - if he says exactly what he thinks, he is telling the truth; if he says something that he knows it's not in line with what he thinks, he is lying.