Nice to to meet you.
It's nice to talk to you, see you around.
You know English is my second langauge, so please bear with me if sometimes I need to stop and think for a sec.
That's a good point.
Hey you got a point there!
That makes a lot of sense.
Definitely! I can't agree with you more!
Is that a picture of your kid? Wow! S/he is so cute! (go really exited with your tone if you are female ^O^)
I like this cartoon on the wall. Remind me of a hero in a carton movie when I was little, you know.
Hey I like the way you decorate your cubicle. Make it feel warm and cozy / classy / cheering ...
You got a nice shirt!