Just tell her you need to speak to someone for a moment and sit down at the next table or something.

I actually need to speak to him about one of his patients.

"Was there something else you needed to speak with me about?"

She needs the leave of the House to speak again.

He needs the leave of the House to speak a second time.

He didn't need to speak to let me know what was on his mind.

"I need to speak to him for three minutes about a problem we're having."

You don't even need any teaching experience or the ability to speak another language.

But first, she needed to speak to another member of the council.

He didn't need to speak or even sign for her to know what was on his mind.