You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

[EX Q]: Sentence1: It is in the centre part of town. Sentence2: That's all. Thank you, goodbye! Sentence3: What is its phone number? Sentence4: Okay, thanks. And what area is it in please? Sentence5: Michaelhouse Cafe is at St. Michael's Church Trinity Street City Centre. How does that sound? Sentence6: I am looking for a restaurant in the expensive price range that serves Belgian food. Sentence7: The phone number is 01223 309147. Sentence8: I have nothing available meeting your request, would you like to try a different price range or another type of cuisine? Sentence9: What is the address of the restaurant? Sentence10: Yes, is there any expensive European eateries? Sentence11: That's good, thanks. Sentence12: Would you like anything else? Sentence13: Yes, there are 4 expensive restaurants serving european food. Which area would you like? Sentence14: your welcome. thanks for calling Question: Who has spoken the sentence 1? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Okay, great. Have a safe trip. Goodbye. Sentence2: Yes please. I need it booked for 1 person for 2 nights starting tuesday. Can i get a reference number? Sentence3: I have found the allenbell guesthouse. It meets all of your criteria, is in the cheap price range, and provides internet and parking. Would you like me to book it? Sentence4: Thank you, that is it for today. Goodbye. Sentence5: The reference number for your booking is KEBFTR7I . Can I do anything else for you? Sentence6: I need a place with rated 4 stars in the east. Can you help me find one that like a guesthouse? Question: Who has spoken the sentence 1? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Thank You. I think that's all I need. Sentence2: You're welcome! Have a great day! Goodbye. Sentence3: Yes, and the postcode please! Sentence4: Ok, cherry hinton hall and grounds is in the east side of town. Would you like the address? Sentence5: cb18dw is their postcode. Sentence6: Good Morning, I am looking for a place to on the east side that has entertainment Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]:
Answer: (A) User