You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Example Input: Sentence1: It's cb12bd. Anything else I can get you? Sentence2: How about something in the south and moderate price range? Sentence3: I'll take Rice House, what's the postcode? Sentence4: There are 3 cheap chinese restaurants in the centre of town: Charlie Chan, Rice House, or Golden House. Would you like me to book any of these? Sentence5: Sure let's try chinese food. Sentence6: I was not able to find any restaurants matching your requirements. Sentence7: I'm still not finding anything. Would you like me to search a different part of town or a different food type? Sentence8: You're welcome. Have a great day! Sentence9: That's all. Thank you. Sentence10: I am looking for a cheap gastropub restaurant in the centre of town Question: Who has spoken the sentence 6? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: Yes, that sounds great! Can I get it for 8 people for 3 nights please, we'll be arriving Tuesday. Sentence2: Great. Are there any trains that go directly from Cambridge to Norwich? Sentence3: Thank you for using our service. Have a good day. Goodbye. Sentence4: Yes, there are several. The trip time is 79 minutes and the cost is generally 17.60 pounds. Can I tell you anything else? Sentence5: I am looking for a guesthouse please. Sentence6: Would you like to try the Alpha-Milton Guest House located in the North? Sentence7: No, that's everything I needed. Sentence8: Any area as fine, as long as it has 3-star accommodations. Sentence9: How about for 2 days? If it's available will you please book and provide a reference number? Sentence10: I'm sorry, the hotel is unable to accommodate your party. Can you arrive on a different day or stay for a different number of days? Sentence11: In what area would you like it to be? Sentence12: I have successfully booked it for 2 days, and your reference number is OUKN0U42 . Question: Who has spoken the sentence 6? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: It is in the center of town. What else would you like to know? Sentence2: Perfect. Your total fee is 10.1 GBP payable at the station . Reference number is : 9C24B086 . Sentence3: Can you tell me about Christ's College? Sentence4: I sure do! It's 01223334900. Can I help you with any other information searches today? Sentence5: I need to leave on Friday some time after 21:30. Sentence6: There is a train that leaves at 23:29, TR3547. Would you like me to confirm the reservation for you? Sentence7: Yes, that would be great. Sentence8: Do you happen to have the telephone number for Christ's College? Sentence9: I also need a train leaving from bishops stortford to cambridge. Sentence10: Wonderful. Have a great day. Sentence11: What time do you wish to leave? Sentence12: Thank you very much, I've got what I need. Question: Who has spoken the sentence 7? (A) User (B) System
Example Output:
Answer: (B) System