Detailed Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Thanks. What's interesting in the way of attractions in the centre of town? Sentence2: Reference number is : G2KRNAR7 . AND PRICE IS 115.5 GBP Sentence3: All Saints Church on Jesus Lane is very interesting. Admission is free and it has the most impressive architecture I've seen. Does that interest you? Sentence4: Okay. Glad I could help. Sentence5: I am heading to Peterborough and need it to leave after 13:00. Sentence6: The phone number is 01223452587, is there anything else I can help you with today? Sentence7: Yes please book 7 tickets. Sentence8: Thank you for your help, I think that will be everything today! Sentence9: There is a train at 1:06 pm on thursday, it is a 50 minute ride. Should I book? Sentence10: I need a train that departs from cambridge and should leave on thursday. Sentence11: What is you destination? Sentence12: Definitely - can I have their phone number? Question: Who has spoken the sentence 4? (A) User (B) System
A:
Answer: (A) User