You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Awesome. I also need a Hungarian restaurant in the centre, please. Sentence2: Would you like a specific price range? Sentence3: Can you help me find a train headed to Cambridge on Sunday? Sentence4: I have a few options, do you have an arrival time in mind? Sentence5: I sure can. Where will you be boarding? Sentence6: No thanks. That will be everything. Goodbye. Sentence7: Absolutely your reference number is Z6QD1AXD Sentence8: I would like to leave london liverpool street after 12:30. Sentence9: That's great can you book it for 8 people? Sentence10: Sure. What about modern European? Sentence11: I don't have any Hungarian restaurants in the centre. Would you like to try another type of cuisine? Sentence12: No, I'm not really particular about the price. Any modern european restaurant would be great. Sentence13: I would recommend Riverside Brasserie. It's a moderately priced modern european restaurant located in the centre. Would you like me to make a booking for you? Sentence14: Yes please, same group of eight, Sunday, 16:45. Sentence15: I would recommend train TR6578 Sentence16: I'm departing from London Liverpool Street, and my train needs to leave after 12:30. Sentence17: Your table is reserved for 15 minutes. The reference number is UQM6L628 . Can I help you with anything else today/ Sentence18: Alright. Have a nice trip! Question: Who has spoken the sentence 1? (A) User (B) System
A:
Answer: (B) System