Thank you for your dream.
The location starts in a government building, so this is a higher authority - most likely your guides and planning your incarnation on earth (leaving a building is often used as an archetypal birth symbol).
I agree with Arnfinnius about the 7th chakra, indicating that the subject matter is about the spiritual aspect of life. You were in the 5th floor which often symbolises the karmic path - learning about yourself from the 5 senses.
The planning stage would also fit with the karmic symbol of 5, planning with your guides before incarnation, what learning situations you would encounter in your life.
Interesting about the conversation. Who was telling you, "there is nothing we can do"?
Getting on a train is also a symbol showing the beginning of the life journey. We would expect to see spiritual gifts in such a dream, and we do - the silver car shows us that you are too use your intuition (connection with higher self) to pursue your life goals (the car).
The boy could symbolise you at the age of about 16 and suggests that your philosophy of life was rather negative at that time (the dark blue shirt and black trousers) - does that resonate? If so, this maybe something that you need to revisit and heal.
On the other hand, I'm not sure that feels right... The dark blue and black might be a reflection of how you view life now and the young boy is a healing agent for this. I'll have a further think about this...
Then we have the various alphabets. Do you have an affinity for languages?
oh and yes i do have an affinity for languages