Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: Booking was successful, the total fee is 24.64 GBP payable at the station .Reference number is : OKXUNQ4W Sentence2: I need help finding a cheap restaurant Sentence3: I would like to go to Ely please. Sentence4: I'm interested in European cuisine. Sentence5: Do you have a time you need to leave or arrive by? Sentence6: We have several options! Where would you like to go? Sentence7: Can you book me a table there for 7 on Friday at 19:45? Sentence8: We have the river bar steakhouse and grill in the centre area, would you like more information? Sentence9: The train should arrive by 13:00 and should depart from cambridge. Sentence10: I would like to leave in Saturday. Sentence11: Yes can you help me find a train as well? Sentence12: Thanks for the help, goodbye! Sentence13: Okay. Can you go ahead and book that train for 7 people please? And give me the reference number. Sentence14: You are welcome, enjoy your stay! Sentence15: What type of cuisine would you like? Sentence16: Sure! Where would you like to come from? What day of the week and what time? Sentence17: Yes. Your booking was successful. The table will be reserved for 15 minutes. Your reference number is ODB8T8HO . Is there anything else I can help with? Sentence18: Your best best is TR0721, leaving Cambridge at 11:50 and arriving Ely at 12:07. The trains only run every 2 hours on Saturdays. Question: Who has spoken the sentence 1? (A) User (B) System
Output:
Answer: (B) System