talk over, consult

I talk over the travel plan.

私は旅行の計画を相談します

I talk over the travel plan in detail.

私は旅行の計画を詳しく相談します

I talk over the travel plan in detail to keep the cost down.

私は費用を抑えるため、旅行の計画を詳しく相談します

I talk over the travel plan in detail with my sister to keep the cost down.

私は費用を抑えるため、姉と旅行の計画を詳しく相談します

I talk over the travel plan in detail with my sister at home to keep the cost down.

私は費用を抑えるため、家で姉と旅行の計画を詳しく相談します