Zdravím Nepřihlášený host!

Interrupting politely

I´m sorry to interrupt.

Just a minute.

By the way ...

Could I just say something?

I´m sorry but ...

Er ...

I see what you mean, but ...

I´m sorry but ...

That reminds me ...

Yes, but ...

What do you think?

Sorry, can I just interrupt?

I don´t really agree with you about that.

Do you agree?

Just a moment, I´d like to say that ...

I´m not sure that I agree with you.