-In conclusion, I'd like to…

　　-I'd like to finish by…

　　-Finally…

　　-By way of conclusion…

　　-I hope I have made myself understood

　　-I hope you have found this useful

　　-I hope this has given you some idea/clear idea/an outline of…

　　-Let me end by saying…

　　-That, then was all I had to say on…

　　-That concludes our presentation…

　　-I hope I've managed to give you a clearer picture of…

　　-If there are any questions, I'd be delighted to…

　　-Thank you for your attention…

　　-Let's break for a coffee at this point

　　-I am afraid that the clock is against us, so we had better stop here

　　-You have been a very attentive audience---thank you