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

Ex Input:
Sentence1: Sure, it's at granta place, Mill lane. Sentence2: Sure it's a moderately priced 4 star guesthouse in the east. Would you like me to book it? Sentence3: From all of us at Cambridge, we hope you enjoy your stay! Farewell! Sentence4: Thank you so much for all of your help today. I am all set. Bye. Sentence5: Could you tell me their address as well please? Sentence6: Thanks! I'm also looking for information on the A & B Guesthouse. What can you tell me about that place? Sentence7: Yes, the post code for the A and B Guest House is cb12dp. Is there anything else I can do for you? Sentence8: What is the phone number for scudamores punting co? Sentence9: Okay, which would you like to leave from? Sentence10: The phone number for Scudamores Punting Co is 01223359750. Is there anything else I can help you with today? Sentence11: Your taxi is booked. The car is a yellow honda and the contact number is 07826111038 Sentence12: May I have the postcode? Sentence13: I would like to leave the hotel by 7:00. Also, can you give me the contact number and car type once you have booked it? Sentence14: I also need a taxi to go between the two places. Question: Who has spoken the sentence 4? (A) User (B) System

Ex Output:
Answer: (A) User

Ex Input:
Sentence1: Please feel free to contact us again for further assistance. Good-bye. Sentence2: Great news! Your booking was successful and I have a reference number for you. It is PL4JEQ9A . Sentence3: Yes please I need a booking for 4 people and 2 nights starting from friday. Sentence4: How about a different hotel in the same price range? Sentence5: Can you find me a place to say in the centre that includes free wifi? Sentence6: I have the Cityroomz hotel which is in the moderate range with internet and no parking. Would you like to book this hotel? Sentence7: Are there any in the moderate price range? Sentence8: Thank you for your help. Sentence9: I can recommend the Alexander Bed and Breakfast. It is a guesthouse in the cheap price range. Sentence10: How about the el shaddai, they have free internet and free parking? Sentence11: Thank you very much. I will. Sentence12: You are very welcome. Please enjoy your stay. Sentence13: That on is not open then, shall I try another? Sentence14: That will be fine. Question: Who has spoken the sentence 5? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: The address for Golden Wok is 191 Histon Road Chesterton and post code is cb43hl. Phone number is 01223350688. Sentence2: How about the golden wok? Would you like to make a reservation? Sentence3: You're very welcome! Sentence4: There are quite a few guesthouses in the North. Is there a price range you prefer? Sentence5: Not for now but I do need their address, postcode and phone number. Sentence6: I have 3 of them. Two are expensive and one is moderately priced. Do you have a preference? Sentence7: You're welcome. Have a great day! Sentence8: I have made a booking for your party at Avalon hotel on 62 Gilbert Road. Your reference number is SSSLFOYC . I'm sure you'll love your stay! Sentence9: Can you help me find a guesthouse in the north to stay at? Sentence10: Can you run a search for moderately priced guesthouses please? Sentence11: Yes, I do. The moderately priced restaurant, please. Sentence12: it doesn't really matter. Book it for 6 for 3 nights on sunday, and I'll need the reference number too please Sentence13: Thanks very much for your help today. Sentence14: Do you need free parking or free internet (or both!)? That will help me narrow it down even more. Sentence15: Thanks for everything goodbye. Sentence16: I would love it more if I wasn't starving. Can you point me in the direction of a good Chinese restaurant near my hotel? Question: Who has spoken the sentence 10? (A) User (B) System

Ex Output:
Answer: (A) User