Well, that's disappointing to hear. This device has its limits, then. Perhaps most of the train's efforts go toward bringing others in from other worlds. Surely doing that takes a lot of resources.

"I see. Thank you for letting me know all the same." If there's an emergency, he'll just have to call out to the entire train. Unless it's a private sort of emergency, in which case he'll just have to do the best guesswork he possibly can.