All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
If someone dreams that he is performing the prayer and gives in charity, then he has indeed seen something good, but he will not get any reward for this unless he does this in reality.
A good dream may be a glad tiding from Allaah for a believer; however, we are unable to interpret the dream which you mentioned in the question.
Islamweb is specialized in answering questions about religious issues and we do not have a section for the interpretation of dreams.
For more benefit, please refer to Fatwa 88262.
Finally, it should be noted that a Muslim is always required to perform good deeds as much as he can.
Allaah Knows best.