Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: where are you going may I ask? Sentence2: Hey, I have some time to kill and I was wondering if there were any multiple sports places in town? Sentence3: Train TR4664 leaves at 21:29 and arrives at 22:07. Sentence4: I would like the postcode, phone number, and address Sentence5: The cherry hinton village centre, on the eastside, is the only one in town. Would you like more information? Sentence6: I also needs a train that leaves after 13:00 on friday. Sentence7: I do not have the hours but they can be reached at 01223576412, can I help with anything else? Sentence8: Yes. May I please get a recommendation for a museum in the centre of town? Sentence9: Can you get me the hours for that one? Sentence10: Yes, I'll also need the postcode and address, please? Sentence11: I would recommend the Regency Gallery. Do you need anything else? Sentence12: There is a train that leave at 13:29 on Friday. Do you want that instead? Sentence13: The phone number for Regency Gallery is 01223365454. Can I be of further assistance today? Sentence14: The cherry hinton village centre is located at colville road, cherry hinton, postcode cb19ej. Their phone number is 01223576412. Can I do anything else for you today? Sentence15: The museum's address is 39 fitzroy street cb11er. May I assist you further? Sentence16: From Cambridge to Bishops Stortford. Sentence17: Isn't there a train that leaves closer to 13:00? Sentence18: ok, what is their phone number? Question: Who has spoken the sentence 12? (A) User (B) System
Output:
Answer: (A) User