Second class is fine.
I'm going on a trip. Please help me check the high-speed trains to Shanghai.
user
From where will you depart?
assistant
I will depart from Nanjing.
user
Have you set your departure date? Let me know and I'll help you check the exact information.
assistant
I plan to leave next Saturday afternoon.
user
What kind of seat would you like?
assistant
Request Train train number