human
I'm going on vacation to Europe next month. Any tips?
assistant
1.  Research the best time of year to visit each country you're considering, as well as any visa requirements that may apply.
2.  Make sure you have a plan for transportation between countries and know what documents you need to get across borders.
3.  Look up local attractions and activities in each city you plan to visit.
4.  Consider taking an international driver's license with you so you can rent cars more easily.