We are encouraged to pray to God for everything. God knows what we need but He does not want to impose anything on us without our will. Whether or not we pray to Him, He provides for all of our needs. We receive hope and confidence when we pray and it is obvious to us that God has heard our prayer and has answered it. The more specific our prayer, the more encouraging for us when we see it answered.
We pray with the expectation that we will hear from God and we thank Him in advance for our answer. There is so much to thank God for. Without God's power we can do nothing, our existence depends on Him, our blessings depend on Him and our very salvation is dependent on Him. We are told that He will never forget us and never abandon us, therefore we can live in hope for our lives here on earth and our lives after this one.