On this day in 1876, the first two-way telephone conversation took place. If you could call anyone, who would it be and why?

On this day in 1876, the first two-way telephone conversation took place. If you could call anyone, who would it be and why?

If I could call anybody it would definitely be my sister. Due to the fact she lives far away from me I don't get to see her often. Therefore I love talking to her so I would call her first.