Detailed Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: No but would you like to try another location ? Sentence2: Could you please book a reservation for me? We need a table for 8 at 12:00 on Wednesday. Sentence3: Do you have a particular area and food type or price range in mind? Sentence4: Please book 8 tickets on the first train leaving after 12:45 on Thursday. Sentence5: Alright, I booked it and your reference is BIL1S6PI . Anything else I can do? Sentence6: I need a train, going to Stevenage on Thursday and it needs to leave after 12:45. Sentence7: I can help what day would you like to depart? Sentence8: There are five trains that leave after 12:45. Do you have a time in mind that you would like to leave at? Sentence9: Thanks for your help, that will be all. Sentence10: I would prefer French. Sentence11: I would like to leave on Thursday. Sentence12: I am looking for information in Cambridge. looking for a place to dine. Sentence13: We have five restaurants to choose from. Would you prefer Chinese, French, European or Asian Oriental food? Sentence14: I want somewhere expensive in the north Sentence15: Yes your reservation number is 1YR1NTHK . Sentence16: restaurant two two is an expensive french restaurant in the north part of town. Can I help you with anything else? Sentence17: Great, thanks. I also need to find a train to Stevenage. Sentence18: You are very welcome! Goodbye now! Question: Who has spoken the sentence 5? (A) User (B) System
A:
Answer: (B) System