Cathay Pacific Asia Miles - Dragonair reservations in HK

Hi guys.
When is the best time to call Dragonair reservation-office in HK ??
Last week I tried to call around 5 PM Hong Kong time and was oon hold for more than 20 min´s, and gave up.
Morning or evening, any suggestions ??
Grateful for any reply.

Wirelessly posted (iPhone 4: Mozilla/5.0 (Linux; U; Android 2.3.6; en-us; GT-I9210 Build/GINGERBREAD) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1)

I call 7pm and beyond