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: That's all I need today. Thanks for your help! Goodbye. Sentence2: Sure, I can help you with that. When would you like to travel? Sentence3: How many tickets do you need to purchase? Sentence4: yes and i need the reference number Sentence5: I will need 4 tickets. Please send me the reference number too. Sentence6: I would like to find a train from Cambridge going to the Stansted Airport. Sentence7: I'd like to leave on Wednesday after 10:00, please. Sentence8: Alright, your reference number is: FLYM23D4, the total fee is 40.4 GBP payable at the station. Anything else I can do for you today? Sentence9: Have a great day! Sentence10: Yes. Can you give me the postcode for Club Salsa? Sentence11: TR2762 leaves at 10:40 and arrives at 11:08. Would you like to book that one? Sentence12: The post code for Club Salsa is cb12jb. Is there anything else I can help you with? Sentence13: Club Salsa is a nightclub located in the city centre. Is there any other information I can provide? Sentence14: I am looking for an attraction named Club Salsa. Question: Who has spoken the sentence 4? (A) User (B) System
Student:
Answer: (A) User