Good idea 
I knew you could do it
You’ve really improved
I like your positive attitude
Thanks for the information
I appreciate your cooperation
We missed you yesterday
Thanks, but the credit really goes to my team
Who is your supervisor? I want him/her to know what a great job you did
Thanks for being flexible
You’re very organized
I couldn’t have completed this project without you
How can I help?
How was your weekend?
How is your (mother, daughter, son, etc.)
Thank you
Thanks for your support
Excellent!
I am impressed with this work
Please join us
I appreciate your putting in the extra effort on this
I value your input
Do you understand or do you have some questions?
You’re on target
Please
I’m sorry
You’re a true professional
Great report
Well done
Bravo!
I trust you (your judgment)
You demonstrated true leadership with that project
Fantastic!
Outstanding!