1-1 Greetings

UNIT 4-10 Basic Greetings

There are various ways to show your appreciation.

Thank you very much.  あligatoo。
POLITE         あligatoo gozaいmas(u)。 

At your level, using the latter expression is safer. But when you speak to children, 「あligatoo」is preferable.

These expressions sound more polite if 「doomo」 is added. 
doomo  あligatoo gozaいmas(u)。

「doomo」is sometimes used independently; however, do not use it alone at this level because it sometimes sounds too casual or even rude.