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

Ex Input:
Sentence1: Have a good day! Sentence2: No thank you, that is all. Sentence3: I am looking for a train to London Kings Cross that departs after 08:15. Sentence4: The TR2000 leaves cambridge going to london kings cross on friday at 09:00. It arrives in london kings cross at 09:51. How does that sound? Sentence5: Yes. What do you have available? Sentence6: Are you departing from cambridge station? Sentence7: I'll be travelling on a Wednesday. Sentence8: That's great. Please book me two tickets. Sentence9: The booking was successful and the fee is 47.2 GBP payable at the station. Reference number is E2N0JHSY . May I assist you with anything else today. Sentence10: What day would you like to travel? Question: Who has spoken the sentence 3? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: I'm looking for an expensive restaurant in the center of town. Sentence2: Certainly. When would you like your taxi to depart? Sentence3: Is there any Turkish cuisine? If so I need the postcode and the address. Sentence4: No, that will be all, thank you! Sentence5: I need to arrive at Cambridge Contemporary Art by 19:15 please. Sentence6: Okay, have a nice day. Sentence7: I don't really care, what do you recommend? I will need the postcode and entrance fee please. Sentence8: I am also looking for museums in the area. Sentence9: How about Cambridge Contemporary Art? The entrance is free and the postcode is cb21su. Enjoy! Sentence10: There are many museums listed in the centre area, what kind of museum are you interested in? Sentence11: No problem. Your taxi has been reserved. Your driver's contact number is 07035811281 and will be driving a grey toyota. Is there anything else you need today? Sentence12: Thank you. I would also like a taxi to commute between the two places. Sentence13: There are many expensive restaurants in the centre of town, is there a specific type of food you would like? Sentence14: The Meze Bar restaurant matches your tastes. It is located at 196 Mill Road City Centre. The postcode is cb13nf. Question: Who has spoken the sentence 10? (A) User (B) System

Ex Output:
Answer: (A) User

Ex Input:
Sentence1: Thank you for contacting Cambridge TownInfo centre. Have a nice day! Sentence2: There are 33 expensive restaurants in the centre of town. Is there a specific type of food you would like? Sentence3: Can you help me find and insanely expensive restaurant located in the centre of town please? Sentence4: That would be perfect! Can I have a reference number for the train? Sentence5: OK. Can you give me their address and phone number? Sentence6: I'm sorry I was unable to find a fusion restaurant. Would you like to try another type of food? Sentence7: TR8494 leaves Cambridge at 13:11 and arrives by 13:58, will this suit your needs? Sentence8: When would you like to travel? Sentence9: You are more than welcome! Sentence10: I have trains departing as early as 05:11 in the morning and as late as 23:11 in the evening. Any time preferences? Sentence11: I want to take a train from Cambridge to Kings Lynn. Sentence12: I'll have to think about it, but thank you. Sentence13: Booking was successful, the total fee is 49 GBP payable at the station . Reference number is : JCZKJYT9 . Can I help with anything else? Sentence14: It will be on Friday. Sentence15: We have several. Do you have a preferred arrival time? Sentence16: I have two expensive mediterranean restaurants in the center. May I recommend shiraz restaurant for you? Sentence17: Yeah, so that restaurant. I want something that serves fusion if possible. Sentence18: Actually, sorry I got ahead of myself. I still want help booking a train that goes to kings lynn on friday after 13:00. I want to book for 5 people. Sentence19: I have train TR8494 that leaves at 13:11 would that work for you? Sentence20: I want one that leaves after 13:00 Sentence21: No, I need to leave after 13:00 Sentence22: That's all I need, thank you! Sentence23: Their phone number is 01223307581, and their address is 84 Regent Street City Centre. Would you like me to make a reservation? Sentence24: Yes please try mediterranean food. Question: Who has spoken the sentence 22? (A) User (B) System

Ex Output:
Answer: (A) User