Hello there,

Thank you for reaching out to us.

We are not sure that Amelia is a good fit for you.

So we could have a user who is looking for a meeting area for tomorrow ...and he needs to see which hour is free..so the booking has to permit the selecion of the date and time starting and date time ending and calculate the price.

We could have a people looking for an office from day X to day Y... and so he has to see which offices are available on that dates... - Amelia cannot be used for multi-day bookings. And it is deigned for appointments. So when you create a service the appointment length can be set for 24 hours. And the prices for services are fixed. 

We could have a people looking for an office from day X to day Y... and so he has to see which offices are available on that dates...

The price of the booking is moving dynamically, I mean, is not the same book an office for a day or for two weeks... - This is the same answer as above. Amelia cannot be used for multi-day bookings. It not a good feet for hotels, BnBs, etc

Can we add additional services to the booking? And the additional services are customizable for every office type? - You can add extras to each service You can read more about it on this link https://wpamelia.com/admin-appointments/

We wish you all the best and hope you have a wonderful day ahead.