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

Example Input: Sentence1: Help me reserve a taxi to take me to kambar Sentence2: Sure! when would you like to arrive? Sentence3: Sure! What is your departure site? Sentence4: Great. Have a wonderful day. Sentence5: Okay I booked your taxi successfully Sentence6: It doesn't matter. I just want to leave there after 10:45 Sentence7: I need to leave from lovell lodge Sentence8: Great, what are the details, please? Sentence9: A white honda will be picking you up, the contact number is 07580557287. Is there anything else I can help you with? Sentence10: That's all I need for now. Thank you. Goodbye. Question: Who has spoken the sentence 3? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Thank you goodbye. Sentence2: the cow pizza kitchen and bar is a moderately priced gastropub in the centre of town. It's located on Corn Exchange Street, and the phone number is 01223 308871. Sentence3: Can I have the address and phone number of a gastropub in the centre of town? Sentence4: There are three gastropub restaurants listed. One is in the east part of town and the rest are in the centre. Sentence5: I would like the address and phone number of the one in the east part of town. Sentence6: A moderate priced irish food restaurant. Sentence7: thank you and good bye Sentence8: there are no irish restaurants. Would you like to choose another type of food? Sentence9: I'm sorry, it appears there are no results for the east part of town. Our system is having difficulty of some sort. Sentence10: Yes, could you please check whether there is a gastropub? Question: Who has spoken the sentence 7? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: You are welcome. Thank you for calling the Cambridge TownInfo Centre. Good bye. Sentence2: Ok we have two guesthouses with that criteria, the Carolina Bed and Breakfast, and the Warkworth House. Sentence3: I'm looking for a moderately priced 4 star hotel. Sentence4: I was able to book you at Warkworth House, the reference number is VTZK341T . Can I help you with anything else? Sentence5: I need a reservation for 4 people for 5 nights starting on Sunday Sentence6: The hotel should include free parking and should be in the east Sentence7: No that is perfect. Thank you very much. Sentence8: We have no hotels with that criteria, but I can search for a 3-5 star hotel if you'd like. Question: Who has spoken the sentence 3? (A) User (B) System
Example Output:
Answer: (B) System