[Vocabulary] reserve vs book

[svetaliya]

Hello. I need your explanation, please.
Why can't we say 'reserve a private lesson' and say 'book a private lesson' instead?'Book' and 'reserve' are synonyms in case we say 'book a table' and 'reserve a table', aren't they? And what is the difference with 'a private lesson'? When do we use both these words equally and when we can't use them both in the same situation? Explain with examples, please.

 

[Raymott]

This is only an educated guess.
We generally don't 'reserve' non-tangible things. We don't reserve lessons, appointments, dates, etc.
If you can see it and touch it (tangible), you can either reserve it or book it.