“wǒ zài kǎolǜ yīxià” “wǒ xiān bùyào le” “xièxiè, dǎrǎo le” dōu néng yòng

“我再考虑一下”“我先不要了”“谢谢，打扰了”都能用。

“Let me think about it,” “Not for now, thanks,” and “Sorry to bother you” can all be used.