Keep that thing in mind

[shubhrata sharma]

My boss told me my mistake. Should I reply that - "ok sir, I will keep that thing in mind for future".
If not then what can I say

 

[Florentia52]

If you're asking about "keep that thing in mind," you don't need the word "thing." "I'll keep that in mind" and "I'll keep it in mind" both work.

Remember to start every sentence with a capital letter ("Okay...") and end it with suitable punctuation ("If not, then what can I say?")