Is it OK to include a personal (non-science related) statement in the final slide of a presentation Is it OK to include a personal note telling intention of hard-work on the topic, 


  e.g. I am looking forward to work on this problem


in the Conclusion slide of a presentation related to possible research topic in the future?

I believe the Conclusion slide is used to collect the scientific conclusions about the work in the end of the presentation as a takeaway message, how would such a statement stand in the end?
I think that writing on the presentation that you'll be looking forward to doing something is somewhat out of place.

In addition, it appears that you may be confusing two separate definitions of conclusion. 

The first is the scientific conclusion, which you have defined. This is, as you've described, the takeaway message from scientific research, i.e. 


  This research shows us that potatoes are actually tasty.


The second is a presentation's conclusion. This can be the scientific conclusion in a presentation about an actual study. However, you're referring to a proposal, which has no conclusion, or perhaps to a slide mentioning future possible research topics.

In this case, your conclusion should be a summary of what you've covered during your presentation, preferably onto one slide, i.e.


  Conclusion 
   - This research will establish whether or not potatoes are tasty
   - Important to humanity as it helps determine whether or not further investment into discovery of potato recipes are practical
   - Funding this project will be cheap as potatoes are grown a lot already


Then, when you present your situation, you can mention I look forward to performing this research with your support. and it flows cleanly.

If I've interpreted anything incorrectly regarding your situation, OP, let me know.