Intention

Subject + will + V1 + Object/Complement
Subject + will not + V1 + Object/Complement
Will + subject + V1 + Object/complement

She will visit her cousins on the next holiday.
She will not visit her cousins on the next holiday.
Will she visit her cousins on the next holiday?

 Use only be going to
Subject + Be going to + V1 + O/C
Subject + Be not going to + V1 + O/C
Be+ Subject + going to + V1 + O/C

She is going to visit her cousins on the next holiday.

She is not going to visit her cousins on the next holiday?

Is she going to visit her cousins on the next holiday?

I would like to tell about my family

I will visit museum today

I want to make a pancake

I am going to introduce my friend

I would rather stay at home than go fishing

Sarah    : Hello Ali, what are you going to do this weekend?
Ali         : Hello, I am going to visit my grandmother in Jakarta. How about you?
Sarah    : Well, I still do not have any plan for the weekend.
Ali         : Why don’t you go to museum?
Sarah    : That is a good idea. But, I have to do my assignment first. Have you done your assignment?
Ali         : No, I have not, I’d like to do them this evening.
Sarah    : Well, can we do together?
Ali         : Yes, of course.
Sarah    : Okay, great. I will go to your house at 4 P.M then.
Ali         : I will be waiting for.