Glad to meet you here.
How nice to see you.
Fancy seeing you.
How are you?
I’m glad to have had the opportunity to meet you here.
I’m glad to meet you.
I’m please to meet you.
It’s a pleasure to meet you.
Could you please rephrase that question / topic?
I’m not exactly sure what you mean…
Do you mean…?
If I understand right,…
I’m sorry if I’m being a little slow, but…?
I’m sorry, I’m not sure I understand. Do you mean (that)…?
So am I right in saying…?
If I’ve got the picture, then…
So what you mean is…, right?
Sorry I don’t quite catch you. You mean…?
Can I get one thing clear?
Would I be correct in supposing…?