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

[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 for using our services. Sentence2: Absolutely, their phone number is 01223358966. Sentence3: You've given me everything I need. Thanks. Goodbye. Sentence4: Am looking for the Parkside Police Station Sentence5: You're welcome. Is there anything else I can help you with today? Sentence6: Thanks for all of your help! Sentence7: You can contact them at Parkside, Cambridge, CB11JG Sentence8: Can I also get their phone number please? Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: No, that's all today. Thank you for your help! Sentence2: I'll be leaving from london liverpool street and I need to arrive in Cambridge by 11:15. Sentence3: Little Seoul is the only Korean restaurant in the center of town, and it is expensive. Would you like to book a table there? Sentence4: I would also like to book a train to Cambridge that day. Sentence5: I would like a place that serves Korean food. Sentence6: Ok. You are all ready to go. Your reference number is 52BZEK4D . The total fee is 33.2 GBP payable at the station. Can I help you with anything else? Sentence7: Thank you have a great day. Sentence8: Are there any expensive restaurants that are centrally located? Sentence9: There are many restaurants that meet your criteria, is there a specific type of food you would like to eat? Sentence10: Okay you're all ready to go! Your reference number is Y8V4909W . Can I help you with anything else? Sentence11: Where are you leaving from? Sentence12: That sounds just delightful! I would like a reservation for two at 20:00 for Friday. And I will need that reference number, please. Question: Who has spoken the sentence 2? (A) User (B) System
[EX A]:
Answer: (A) User