There was this cartoon which has this human guy (the main character) and his friend, a helicopter (or maybe some other sort of aircraft).
The ending of the cartoon has them singing, saying "I am ..... and my best friend Kokie (cookie or a word that rhymes with cookie)... see you again .... good bye!"
The cartoon looked a bit like Bob the Builder and there were these other vehicles/objects that could talk too. I saw it in 2008 on the TV in Qatar, along with Lilo and Stitch, Bob the Builder, a cartoon with a brown fox that had a dog as the enemy (it's like a silent cartoon, Feodrrr?), and Harry and His Bucket Full of Dinosaurs.
The helicopter is not only his friend, there was another ship too.
Suggestions with Biplanes can also be useful since I have the vague remembrance.