just additional: 1) The 'a' in hallo is pronounced as the 'a' in afternoon. As for the rest, it's pronounced the same as hello 2) You is both formal and informal. A formal thank you is 'dank u'/'dankuwel'. Informally, it's 'dank je'/'dankjewel'. Again the 'a' is pronounced the same as above. The 'u' is pronounced as a German 'ü' (I don't know if you're familiar with it?), 'je' is prounced as y in you and the a from as in a (cat/dog/whatever). 'wel': w holds the middle between an english v and w. the e-sound is like in best. Of course you have different sayings for hello (see WDF81) and thank you...

Hy In the morning you say goedemorgen at the afternoon you say goedemiddag and in the evening you can say goedenavond

Hello = Hallo Thank you = Dankje wel

hello = hallo, goedemorgen (good morning), goedemiddag (good afternoon), goedeavond (good evening) thank you = dank u