Phrases for train tickets

Hi,
Looking for a page where I can find useful phrases when visiting the Midori no Madoguchi, like when cancelling tickets, reserving, changing Date, time, etc... In case I want to make myself understood when English is no use.

Thank you very much in advance!

JR staff tend to have enough English.

Train numbers, and times (from Hyperdia) is all you need (in fact, you'll be just fine if all you have is the destination).

It is recommended to write down the date, either train number/time or approximate time of departure, station names (boarding and destination), for how many people, etc., on a piece of paper and show.

If you want to use phrases, the simplest ones are:

- Yoyaku wo onegaishimasu. (Reserveation please.)
- Kyanseru wo onegaishimasu. (Cancellation please.)
- Henkou wo onegaishimasu. (Change please.)