Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: Okay, booked it and your ref. is TJGHMT3I . Sentence2: Thanks, that's all I needed today. Goodbye! Sentence3: Certainly. Will you be departing from Cambridge? What time would you like to leave after or arrive by? There are departures every hour from 5:01 through 23:01. Sentence4: Yes can you please for three at 17:00. Sentence5: I recommend Jinling Noodle Bar. It's located at 11 Peas Hill City Center. Would you like me to book a table for you? Sentence6: Thank you. Let me know if there is anything else I can assist you with. Sentence7: I would like a suggestion of a moderately priced Chinese place. Sentence8: The next train after 15:45 leaves at 17:01 from Cambridge. Would you like to book this train? Sentence9: I want to find a Chinese restaurant in the centre of Cambridge. Sentence10: I would like to leave Cambridge after 15:45. Sentence11: Can you book it for me and get a reference number ? Sentence12: There are 10 choices and we have cheap, moderate and expensive options, any preference? Sentence13: 2 please and I need a ref. number. Sentence14: What day would you like to dine on ? Sentence15: I want a reservation for 2 people at 17:30 on thursday. Sorry, I don't know why I said the other thing before that. I must be going crazy. Sentence16: Your table was booked. Your reference number is 42XEDGDF . Is there anything else I can help you with? Sentence17: Yes, please book it and provide the reference number. Sentence18: I also need a Friday train to Broxbourne. Sentence19: On what day would you like your reservation? Sentence20: How many train tickets would you like to book? Question: Who has spoken the sentence 10? (A) User (B) System
Output:
Answer: (A) User