Are sentences correct?

yes

Many thanks, Region Philbis.

don't mention it, Yoong.

you're english has gotten very good...

Thanks for the compliment. I'm still learning and appreciate very much the help rendered by the humble and helpful native speakers of this Forum. I think it is the best English forum for non-native speakers because all of you guys are friendly, patient and some are humorous too.

Cheers.