In accordance with our cancellation policy, you will get a refund of:
3 days prior to departure - 90% of total cost
2 days prior to departure - 70% of total cost
1 day prior to departure - 50% of total cost
Within 24 hours - no refund
聼起來自然嗎?

@deris79: the words are completely natural, however, the punctuation should be changed. It should include more breaks between each departure period so English speakers can understand the differences. Example: In accordance with our cancellation policy, you will get a refund of: 90% of total cost 3 days prior to departure - 70% of total cost 2 days prior to departure - 50% of total cost 1 day prior to departure - no refund within 24 hours notice.