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: Ok, please reply if you need any further assistance. Sentence2: Sorry to hear that. If you need to reach the police in Parkside, Cambridge CB11JG, their number is 01223358966? Let me know if there is anything else I can do. Sentence3: I was just in a car accident and need help figuring out what to do next. Sentence4: I am calling the police and if I need anything else will contact you later. Goodbye. Question: Who has spoken the sentence 1? (A) User (B) System
Output:
Answer: (B) System