I repeat it; by the time I write/say ‘I already told you’ (a statement I always find unnecessarily annoying) or ‘Is in the guidebook’, I find it faster to type “Main dock in middle of town at 1pm”.
I always take the tack with all guests to get to the point, and not waste a nano-second with any other build-in indirect ‘message’. Sometimes is best to act like an accommodating simpleton in this business.