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: reference number is K13L3ILC . Sentence2: Yes, could you book me tickets for 7 people on that train? Sentence3: Thank you. You have covered everything. Sentence4: The TR7223 arrives in Cambridge at 20:08. Will that suit you? Sentence5: There are 4, I would recommend Cambridge Artworks 5 Greens Road, postcode cb13ef, number 01223902168. There is no entrance fee. Is there anything else I can assist you with? Sentence6: thank you for using our system. have a good day. Sentence7: There are no cinemas in the east. Can I help find something else? Sentence8: Actually, yes, I do need that reference number on that train. And, maybe you could find a museum instead of a cinema? Sentence9: What about a museum? Are there any of those in the east? If so, please give me some additional information including the entrance fee. Sentence10: sure, what day are you traveling? Sentence11: I need a train that gets me into Cambridge by 21:30 Sentence12: I'm leaving on Saturday. I am coming from London Kings Cross. Sentence13: Can you recommend a cinema in the east? Sentence14: Absolutely! Go ahead and pay 132.16 GBP at the station for the 7 tickets. Would you like your reference number? Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System