What is the subject of the conversation?

M:Have you gotten used to the new software John installed on your computer yet? It’s supposed to be faster and easier to use than the program that was originally there.
W:I don’t know because I haven’t had the time to use it yet. I’ve been away on a business trip and just got back this morning. Tell you what, I will try it out this morning and let you know how it is at lunch. I just hope it won’t take long for me to learn how to use the program.
M:You shouldn’t have any problems with it. The command keys are exactly the same as the old program.
W:Is that right? I guess I won’t have any problems using it then.
Number 50.What is the subject of the conversation?
Number 51.What does the man want to know?
Number 52.What is the woman going to do at lunch?