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

[EX Q]: 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 A]: Answer: (A) User

[EX Q]: Sentence1: Maybe you could try again? Sentence2: I am looking for a place to stay in cambridge in the moderate price range with 4 stars Sentence3: I found the restaurant you want. Do you want me to make reservation? Sentence4: I am having a hard time booking this, could I make sure the place you would like is the Pizza Express at Fen Ditton? Sentence5: There are 11 matches. Do you have a preference for hotel types? Sentence6: Yes, for 5 people on Friday around 13:45, please Sentence7: I am not able to book anything right now. Sentence8: Okay....well I'm over here waiting....don't forget the reference number too Sentence9: I will go ahead and book that for you now. Sentence10: Thanks for the room booking. Can you locate a restaurant for me, too? The name is pizza express Fen Ditton. Sentence11: The booking worked this time! The reference number is S31A87TV . Anything else today? Sentence12: No problem. If you need anything else just call us back. Sentence13: Yes it is, but if 13:45 time isn't working then 12:45 would also be acceptable. Sentence14: Great, thanks for your help! Have a good one. Sentence15: You have a room booked at the Warkworth House (ref# TP8X26LA). Can I help you with anything else? Sentence16: No, but it should be in the east. Sentence17: I have 3 guesthouses matching your request. Do you care about parking? Sentence18: Pick one and book me for 5 people lasting three nights starting Friday please. Question: Who has spoken the sentence 15? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Okay what day will you be traveling? Sentence2: My favorite thing to do is look at the architecture at Holy Trinity Church. It's located on Market Street and it's free to get in. Does this work? Sentence3: Thank you. Let me know if I can help again. Sentence4: Okay can I get the reference number? Sentence5: Thank you. That is all I am inquiring about today. Sentence6: Perfect! I would like to book it for 4 people. Sentence7: No, not really. What's your favorite thing to do in the centre of town? Sentence8: I was able to book it, reference number is XYAQ9XA4 . Sentence9: Yes please book it for 4 people and give me the reference number. Sentence10: Would you like me to book it now? Sentence11: I found 44 different attractions near that location, is there something specific you're looking for? Sentence12: Can you help me find a place to go in the centre? Sentence13: I have a train to Kings Lynn that arrives at 12:58. Sentence14: I will be leaving from Cambridge on Sunday. Sentence15: Yes And I would like to find a train that arrives by 13:00 going to Kings Lynn. Sentence16: I will work on getting that booked and be right back with you. Question: Who has spoken the sentence 6? (A) User (B) System
[EX A]:
Answer: (A) User