Iwan : Friday is the due date for our
assignment.
Andi : Sorry. Could you repeat what
you just said?
Iwan : I said Friday is the due date for
assignment.
Andi : Yes, you are right, but I'm sure
that I can submit it before that.
How about you?
Iwan : I'm not so sure I will be able to
make it
Andi : Yes, you can. I'm sure, you can.
The underlined sentence is used to express ....