(目的地) 行きの電車は、このホームで合っていますか？ — Is this platform correct for the train going to (destination)? (Train · Station, Formal — to staff, JLPT N4)

Gesture & etiquette

Pointing at the platform number or the destination sign, then looking at the staff member with an inquiring look.

Always confirm your train and platform, especially in major stations or when dealing with express/local services. Don't block the platform while asking.