13 And whatever you ask in My name, that I will do, that the Father may be glorified in the Son.
14 If you ask anything in My name, I will do it.
15 "If you love Me, keep My commandments."
The Lord's prayer (Matthew 6:9-13) doesn't mention the Son. Now the disciples are told to pray in His name(v.13) (John 16:24).
Praying in Christ's name is to realize one's standing in Christ and seek His glory by seeking His will.
These three verses continue the thought in verse 12. The disciples were to ask in Christ's name regarding the works they were about to do for Him.
Verse 15 is still part of His comforting of the disciples. He's encouraging them to continue doing what He's asked them to do, even after He's gone. (1 John 3:22).