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

Ex Input:
Sentence1: Graffiti sounds good. I actually need that reservation for 5 people at 20:00 on Wednesday. Can I have the reference number for that? Sentence2: There are two trains that would work. One arrives at 07:07 and the other arrives at 01:07. Which one would you prefer? Sentence3: I would recommend Graffiti. It is a bit expensive, so if you want something moderately price there is also Saint Johns Chop House. Sentence4: Great, thanks! That's all I needed right now! Sentence5: Alright, I've booked a train for your group, the reference number is AOIMGBHK, and there will be an 83 GBP fee at the station. Sentence6: What time would you like these reservations? Sentence7: I need to find a British restaurant in West Cambridge. Sentence8: i can definitely do that, how many tickets would you like? Sentence9: No, can you recommend a favorite? Sentence10: I would also like a train departing from london liverpool street and arriving in Cambridge at 09:00 on the same day. Sentence11: Please book 2 tables for 8 people on friday also i need train tickets for 8 people. Sentence12: There are multiple options for you. To narrow them down what price range do you have in mind? Sentence13: Can you book the train that arrives at 07:07 that one would work great. I need the reference number as well. Sentence14: it's for the same group of people Sentence15: Booking was successful. The table will be reserved for 15 minutes. Reference number is : YYPPDY56 . anything else i could help you with? Sentence16: You're welcome. Have a great day. Question: Who has spoken the sentence 11? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: Thank You good bye Sentence2: Yes. Kymmoy is an expensive restaurant serving asian oriental food in the centre part of town. Sentence3: Thank you. May I have their phone number? Sentence4: Their number is 01223 311911. Will that be all today? Sentence5: Yes, thank you. Sentence6: There is not matching places that fits your request. Can i help you with something else? Sentence7: Are there any Asian Oriental restaurants in that price range? Sentence8: I'd like to find an expensive restaurant that serves venetian food. Question: Who has spoken the sentence 7? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: That is perfect. Thank you that's all I needed today. Sentence2: Thanks so much. Could I bother you to help me find an expensive Chinese restaurant? Sentence3: I need the price for the train that leaves at 10:40 for one and the arrival time. Sentence4: The price is 75.10 per ticket and arrives at 13:23 Sentence5: I have a trip on wednesday and I need a train that departs from birmingham new street. Sentence6: TR7940 leaves at 10:40. Would you like me to book some seats for you? Sentence7: The train should depart from birmingham new street and should leave on wednesday. The train should leave after 10:15 and should go to cambridge Sentence8: Yes, please book two seats for me at 10:40. What time will it arrive in Cambridge? Sentence9: We have several. What part of town would you like it in? Sentence10: No preference. But please make sure I get the address. Sentence11: You will arrive by 13:23. I have 2 seats booked for you, and the reference number is RBQLUN8O . Is there anything else I can help you with? Sentence12: there are many that day. can you specify your destination? Sentence13: You're welcome. Have a great day! Sentence14: i recommend a place called Hakka. they are located on milton road chesterton. Question: Who has spoken the sentence 11? (A) User (B) System

Ex Output:
Answer: (B) System