you will be leaving on the following train:

10:04am         Depart Interlaken Ost with Golden Pass train #2217
12:04pm         Arrive in Lucerne

You have to take this train. If you miss it you will loose your seat reservation.

You are in wagon #10 and have seats #51 and 52. according to separate vouchers (please print out these seat reservations and bring them with you).

Interlaken West to Interlaken Ost
From Interlaken West you have direct trains to Interlaken Ost several times per hour and they take 7 - 12 minutes. To catch the 10:04am train in Interlaken Ost, you will need to take the following train:

09:52am         Depart Interlaken West
09:57am         Arrive in Interlaken Ost

Or you can take a local bus which takes 7 - 12 minutes.