The Accidental Tourist (1988) Review
The Accidental Tourist refers to a series of books written by character Macon Leary (William Hurt), who helps business travelers to make their travel experience a bit better by giving them tips, such as to take packets of laundry detergent so that they can pack lightly yet still have everything they need at their disposal.
He returns from one of his trips to find his wife is leaving him. A year after their son died, she has decided that she cannot handle it any more and needs to get away. Being essentially destroyed, he simply moves on with his life. He fights for a while and then gives into the advances of a dog trainer who seems interested enough to pursue him (played by Geena Davis).