See it work
The evening before a fjord day
An Indian tour desk writes to a guest staying in Bergen. Play the thread: one template, a question about the boat, boarding passes, all on the guest's Indian number.
The template carries only what the guest needs to act on: where, when and what to bring. Everything after her reply is a conversation, answered by whoever is on the desk in India, with documents attached.
Send the reminder the evening before by Bergen time, not the morning of: in summer a 07:00 Bergen message would leave India at 10:30 IST, too late for a guest already queueing for breakfast.