Luke 11 is all about our attitude to prayer. Note first of all, that Jesus was praying in a certain place; just Jesus and Jesus alone. However, the disciples were watching him and maybe even listening to him pray.
No doubt Jesus prayed with meaning and fervour. Just look at his prayers in the Garden of Gethsemane where he even sweated blood. Jesus prayed intense prayers and he got answers to his prayers.
The disciples thought that the words made the difference. “Teach us some words Jesus, like John taught his disciples some words.!”
In those days, famous Rabbis composed special prayers for their followers. Possibly, it elevated the disciples’ status. Now they can boast of their leader’s prayer.
Don’t let prayer become your boasting point.
For it is by grace you have been saved, through faith—and this is not from yourselves, it is the gift of God— not by works, so that no one can boast.(Ephesians 2:8-9, NIV)