Given the task definition and input, reply with output. You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Would you like to book a table? Sentence2: Hi, I'd like to book a train to stansted airport from cambridge. Can you help? Sentence3: On Saturday. Is there a train that will arrive by 15:15? Sentence4: Absolutely. Where will you departing from? Sentence5: You're welcome. Please let me know if you need anything else. Sentence6: Sure - The Lucky Star serves Chinese food and Nandos serves Portuguese food. Do either of those sound good? Sentence7: Can you also tell me the postcode? Sentence8: Sure. The post code is cb17dy. Sentence9: There is! TR7213 leaves at 05:40 and arrive at 06:08 it is 10.10 pounds. Can I book that for you? Sentence10: Thanks for your help. Good bye. Sentence11: No need to book it. Thanks. But can you help me find a cheap restaurant in the south? Sentence12: The Lucky Star sounds good. That's all I need. Sentence13: What day would you like to leave? Sentence14: From Cambridge, which is why I asked the Cambridge TownInfo centre. Question: Who has spoken the sentence 8? (A) User (B) System
Answer: (A) User