What is the man concerned about?

W: I’ m sorry I didn’ t return your call earlier. I was planning to be back in New York for Christmas, but my flight from Boston was cancelled due to the heavy snow.
M: That’ s alright. Will I be able to see you before you go back to San Francisco? By the way, I grew up in Boston. What were you doing there?
W: I was in Boston for the flower show. It was not as great as I thought, but it was my first time in Boston — what a beautiful city! I didn’t know you were from there. I finally got the flight of 26th and I’ II be here until New Year’ s, so let’ s meet when you have time.
M: That’ s great. Then, how about the 28th?