Renting a Car and Choosing Insurance: what to say in English

I have a reservation under the name Li. I booked a compact car online.

To confirm your reservation at the rental desk.

What's the difference between basic coverage and full coverage insurance?

To understand insurance options for the rental car.

Is the collision damage waiver worth it? I'm a pretty careful driver.

To decide on extra insurance based on driving habits.

Does this car come with GPS, or should I just use my phone?

To decide between using car GPS or phone.

Do I need to return it with a full tank? What happens if I don't?

To know fuel policy for returning the car.

Hi, I'm returning the car. Where should I park it?

To ask where to park when returning the car.

There's a small scratch on the bumper. It was already there when I picked it up — I took photos.

To report pre-existing damage with evidence.

Can I get a copy of the final receipt emailed to me?

To request a digital copy of the receipt.