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

Ex Input:
Sentence1: Your reservation was successful and your reference number is UO8AN5FO . Is there anything else that I can help you with today? Sentence2: I am looking for the Alpha-Milton Guest house and would like to book it for 5 people for 2 nights starting Friday. Can you send me the reference please? Sentence3: That's all, thank you so much! Sentence4: Thank you for calling, enjoy! Goodbye. Sentence5: Sure, what is the name of the hotel? Sentence6: Hello. Can you help me in locating a certain hotel? Question: Who has spoken the sentence 2? (A) User (B) System

Ex Output:
Answer: (A) User

Ex Input:
Sentence1: You're welcome. Can I help you with anything else? Sentence2: That is all. Thanks Sentence3: The post code is CB11JG. Sentence4: Thank you, what's the post code? Sentence5: Thank you for your help Sentence6: Cambridge, parkside police telephone number 01223358966. Sentence7: I need to get to the nearest police station, can you assist me? Sentence8: Okay. Have a good day and thanks for using our system. Question: Who has spoken the sentence 4? (A) User (B) System

Ex Output:
Answer: (A) User

Ex Input:
Sentence1: Sure, how about dojo noodle bar postcode cb21rq and 01223363471 phone number. Would you like a reservation? Sentence2: I found several that fit your request! What type of food would you like? Sentence3: Nope you gave me everything I wanted to know. Thanks bye! Sentence4: No preference. Can you recommend me one and give me their postcode and phone number? Thanks! Sentence5: The phone number is 01223363471 if you need it. Is there anything else I can help you with today? Sentence6: No thank you not at this time. Sentence7: I am looking for a restaurant in the centre of town in the cheap price range. Sentence8: Okay. Glad to have helped! Question: Who has spoken the sentence 3? (A) User (B) System

Ex Output:
Answer: (B) System