Learning how to wait.

One day T came to a teacher and said he missed his sister in the 1^st Grade.  He asked to write a note.  The teacher and T co-constructed a note together.  It said "I want to visit my sister in the first grade."   So T put it into an envelope and the teacher addressed it “First Grade”.   We were not able to deliver the note at that time so T had to wait until the teacher could continue with his request.

 The next day T was able to deliver his note downstairs to the mail boxes. 
 T wanted to go for his visit right away but the teacher explained that he needed to wait for a reply.  He was very disappointed.

I wonder  what will happen next?