Based on the context and the answer, generate a question. 

Context: Someone else who was mowing the lawn borrowed my lighter ( I have it especially to use for fondues . Really . And , incidentally , was given it by another random person at a gas station ) and struck up conversation as he took a break from his work . One of my nicest encounters was on my walk to work , a couple months ago , when an old man was walking his dog . " You 're late today , " he said .

Answer:

He is used to seeing her walk at a specific time



Why did the old man comment that the speaker was late today ?