Teacher:You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Teacher: Now, understand the problem? Solve this instance: Sentence1: No thank you, that is all I need right now. Goodbye. Sentence2: Of course, thanks! I'll be traveling on Tuesday, departing from Stevenage. Sentence3: The entrance fee is free and its located in the west area. Churchill college is a college. Sentence4: Okay, and is there anything else you need help with or will that be all? Sentence5: I need a train for tuesday leaving after 13:15. Do you have one? Sentence6: Yes, it is located in the west. Address is Storey's way. It is free to enter. Sentence7: The ID is TR1830 and it leaves at 13:54 and arrives by 14:43. Do you want me to book it? Sentence8: I have 229 results for trains leaving after 13:15, could you be more specific on where you want to depart/arrive and what day you are traveling? Sentence9: Thank you for contacting Cambridge TownInfo Centre. Have a great day! Sentence10: That sounds good. Can I get the train ID and the departure/arrival times? Sentence11: Just want to make sure I understand you correctly, Churchill College is a college, but what type of a attraction is it? Is it a college museum? Sentence12: The travel time for TR1830 is 49 minutes. What would you like to know about churchill college? Sentence13: What sort of place is it, and what area of town is it in? Sentence14: No thank you. Sentence15: First train leaves at 13:54 on tuesday Sentence16: It appears to be listed as a college in the West. Is there any other information on it you would like? Sentence17: Not right now, thanks. But can you tell me a little about Churchill College? Sentence18: Great, and what type of attraction is Storey's Way? Also, backing up a bit, can you give me the travel time for Train TR1830? Question: Who has spoken the sentence 1? (A) User (B) System
Student:
Answer: (B) System