How nice to meet you!
= Nice to meet you!
= Nice meeting you!
= Glad to meet you!
= Good to meet you!
I'm very pleased to make your acquaintance.
acquaintance n. 相识，熟人
make one's acquaintance“结识某人”
I've heard so much about you.
= I have often heard about you.
Mary has told me so much about you.
Mary has told me all about you.
I'm very happy to have an opportunity to meet you.
So we finally meet face to face.
opportunity n. 机会，时机
I'm sorry, what was your name again?
I didn't catch your name. I'm terrible at names.
catch v. 领悟，弄明白
I have been wanting to meet you for some time.
I've been looking forward to meeting you.
look forward to“盼望，期盼”
It's a pleasure to meet you!
= What a pleasure to meet you!