Worked in the cinema. ))
Therefore, I will propose such a variant of determining the essence of the session - this is the period of time in which a certain film is being played in a certain hall (there may be several of them).
Therefore, in the session you need to bind to the hall, in my opinion.
Regarding the price - here it depends a lot on what - on the film itself (very good, very long), on the hall (Vip hall, regular hall), on the place in the hall - (center, sidewalls, etc.)
Films are also better to throw in a separate table with the necessary attributes (duration, genre, title, etc. - this is what you need).
But this is "... and there is no possibility to limit tickets for a session within the same hall." - do not quite understand what is meant by this?