What may be the relationship between the speakers?

M: Good morning, Jenny, how is your summer holiday this year?
W: Fine. You know, Frank, I just came back from traveling.
M: Oh, then where did you go?
W: I went to America, the northeast area of that country.
M: Really? How did you like it?
W: Amazing, the most impressive part was my trip to Washington D.C., there are so many memorials and museums in that city. You know my major is history, this experience gives me a good chance to know more about American history.
M: Oh, tell me about it. You know, I have been thinking about going there on holiday next year.
W: Well, first it is worthwhile to go to the National Mall, there you could enjoy the beauty of White House, the Capital Hill, Lincoln Memorial and the National Space Museum, the National Art Museum, and so on.
M: En, it sounds good. By the way, I will also go to Philadelphia to visit one of my cousins. Have you been there and where should I go there?
W: Yes, I also have been there. In the down town area, you are recommended to go to Liberty House and the tomb of Benjamin Franklin, both of which are closely related to American early history.
M: Thanks, I really appreciate your help. Now let’s go to register our courses this term together.
W: OK.