The gardener falls asleep on the train. Having ruminated about everything that isn't really that important, the gardener is exhausted and falls asleep, only to be awakened by the train broadcasting system, notifying the train's last stop.
The gardener gets out of the train and looks at the Gardener's phone. The network is full but nobody calls the gardener. The gardener is waiting for this one important call. It's impossible to call the salesperson back as the gardener has tried, it just didn't connect anywhere. Without this salesperson, the gardener has no idea what to do. Time is running out, if the Person does not call soon, the gardener's journey will definitely fail...