You will be given a definition of a task first, then some input of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: I would like you to help me find a train departure. The train should leave on thursday and arrive at cambridge. Sentence2: From Bishops Stortford after 15:00 Sentence3: Train# TR7759 departing from Cambridge at 15:29 arrives in Bishops Stortford at 16:07. Can I help you with anything else? Sentence4: Ok thank you for your help. Sentence5: Ok! I suggest the Archway House. Would you like a room book? Sentence6: Sure, thanks, for 6 people, for 2 nights, starting Thursday, please! Sentence7: I have 5 trains. They depart 15:29, 17:29, 19:29, 21:29, 23:29. They are all 38 mins travel duration. Sentence8: No, I just need the train ID and arrival time Sentence9: Can I look up anything else? Sentence10: I'm sorry, there are no trains that day. Would you like to try another day? Sentence11: Thank you for using the Cambridge TownInfo centre. Have a great day! Sentence12: Alright, would you like me to make a booking for you? Sentence13: We have you set at Archway house. Reference number is P1FFCU2Z Sentence14: area and price are of no concern to me as long as the guesthouse has free parking and free wifi Sentence15: I think you should try again. Cambridge to Bishop Stafford on Thursday. Sentence16: I'm also looking for a place to stay. The hotel should include free parking and should include free wifi. Sentence17: There are about 8 choices. Did you want a certain area or price range? Sentence18: Where will you be leaving from? Sentence19: No that is it. Thank you. Sentence20: PLease give me the info for a train meeting the above listed criteria. Question: Who has spoken the sentence 8? (A) User (B) System
Output:
Answer: (A) User