John 16:24 Until now you have asked nothing in My name. Ask, and you will receive, that your joy may be full.
When Jesus was telling the disciples that He was going to die, He also gave them hope they could cling to. He told them that He would answer prayers.
Because of what Christ was going to do, He was placing Himself in the best position possible to make sure that all prayers could come through Him and be faithfully and fully answered.
What better advocate do we have than Christ Himself taking our requests directly to God the Father to be answered because He requested it!