给定一段对话，要求将其中的所有对话者按照出现的顺序排列，并标注说话者。


A: Hi, how are you?
B: I'm doing well, thanks for asking. How about you?
A: I'm a bit tired, but otherwise I'm fine. What have you been up to?
B: Oh, not much. Just working and spending time with friends.
A: Hi, how are you?
B: I'm doing well, thanks for asking. How about you?
A: I'm a bit tired, but otherwise I'm fine. What have you been up to?
B: Oh, not much. Just working and spending time with friends.

Speaker A: Hi, how are you?
Speaker B: I'm doing well, thanks for asking. How about you?
Speaker A: I'm a bit tired, but otherwise I'm fine. What have you been up to?
Speaker B: Oh, not much. Just working and spending time with friends.