Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: I would like a guesthouse in the west that is 3 stars. Sentence2: Okay. Can you book the Hobsons House for 4 people and 5 nights starting on Saturday? Sentence3: I need a guesthouse, with parking that is free. Sentence4: What is the travel time of that train? Sentence5: I would recommend the acorn guest house. Would you like a reservation? Sentence6: I now have seven results. To help narrow it down more, what time would you like to depart? Sentence7: That is all for now. Thanks Sentence8: entrance fee, address, and phone number Sentence9: I need to arrive in cambridge by 19:15. Sentence10: Thank you for contacting Cambridge TownInfo centre. Goodbye! Sentence11: The travel time is 38 minutes. Is there anything else I could help you with today? Sentence12: I have TR 3474 from bishops stortford to cambridge arriving at 18:07. Will that work? Sentence13: You got it! Booking was successful. Reference number is : INXJI4JD . Sentence14: Whatever gets me an arrival time closest to 19:15 Sentence15: Great, thanks, sorry for the confusion earlier! Can you help me find a train, too, please? I'm traveling from Bishops Stortford to Cambridge on the same day as my hotel reservation. Sentence16: Phone is 01223304906. Address is 96 barton road. There is no entrance fee. Sentence17: I have several trains that fit that description. What time would you like to travel? Sentence18: With that criteria, I only have one option. It would be the Hobsons House. It is moderately priced and offers free parking and wifi. Would you like to book? Question: Who has spoken the sentence 12? (A) User (B) System
Output:
Answer: (A) User