The Lord has shown unfailing love and faithfulness to my master for he has led me straight to my master's relatives - Genesis 24:27
Gratitude should flow naturally from the Creator-creature relationship
He wants you to bring your needs and desires to him in prayer so he might meet them and then thank him for answering
Eliezer went to God and asked very specifiically and directly a sign for show him the woman for Issac
When God gave Eliezer exactly what he asked for and remembered to turn to him immediately to praise and thank him