You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Example: Sentence1:i need a place to dine in the center thats expensive Sentence2: I have several options for you; do you prefer African, Asian, or British food? Sentence3: Any sort of food would be fine, as long as it is a bit expensive. Could I get the phone number for your recommendation?Question: Who has spoken the sentence 2? (A) User (B) System
Example solution: Answer: (A) User
Example explanation: The sentence 1 is said by a user because the intent of it says that the information has to be gathered from the system

Problem: Sentence1: I don't see anything with that criteria. Perhaps you would like a different cuisine? Sentence2: I have many trains meeting your request. What is your destination and preferred departure and arrival times? Sentence3: Actually, that's all I needed. Thank you for the help! Goodbye. Sentence4: Great! Have a great day. Sentence5: Can you look for chinese food? Sentence6: Thank you for your assistance. Sentence7: I found a chinese restaurant named tang chinese located at Napier Street City Centre would you like to reserve a table? Sentence8: Sorry there is no panasian food in any area. Would like me to find a different restaurant? Sentence9: The arrival time is 17:27. Price is 16.60 pounds. Duration is 88 minutes. Sentence10: Was there anything else I can do for you today? Sentence11: Okay, Booking was successful. The table will be reserved for 15 minutes. Reference number is : MCSWQ2W5 . Is there anything else I can help you with? Sentence12: I have a train TR 2815 leaving cambridge at 15:59 on wednesday and arriving at 17:27 at london liverpool street. Would you like to book this? Sentence13: Can you help me find an expensive Panasian restaurant, please? Sentence14: I also need to train leaving from cambridge on thursday. Sentence15: book a table for 6 people at 14:45 on tuesday. Sentence16: My destination is London Liverpool Street, departing on Wednesday from Cambridge after 14:15. Sentence17: No, could you give me the price, arrival time, and overall travel time, please? Sentence18: Are you sure there isn't any in the centre? Question: Who has spoken the sentence 12? (A) User (B) System
Solution: Answer: (A) User