You will be given a definition of a task first, then some input of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: The address is 100 Mill Road City Centre. Sentence2: I am looking for african food Sentence3: There is one African restaurant listed called bedouin. Would you like more information for this restaurant? Sentence4: Thank you. Goodbye. Sentence5: Thank you, goodbye. Sentence6: Yes. I need the address please. Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System