Hi, Mr. Smith.

Hi, Dave.

Tony, I'd like you to meet Professor Smith. Mr. Smith, this is my friend, Tony.

It's a pleasure to meet you, Mr. Smith.

Nice to meet you, Tony.

Dave told me how much he enjoys your class.

Did you, Dave? Well, Dave helps to make it a good class.

Oh, that's interesting. Excuse us, we're going to catch a movie, and it's about that time. Very nice meeting you, Professor Smith.

Same here. Have fun!