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

Sentence1: Yes I was able to locate 4. Can I book a table for you? Sentence2: Thanks so much! Sentence3: Is there anything else that I can book for you or assist you with for your upcoming trip? Sentence4: Are you looking for a Danish restaurant? Sentence5: Yes please in the same area and price range. Sentence6: For four, Thursday, 11:45. Sentence7: Booking unsuccessful. Would you like to try another restaurant? Sentence8: Thank you have a good day. Sentence9: Yes please. In the centre of town. Sentence10: Yes please,for tonight at 9 PM if possible. Sentence11: I will make a booking for you at hk fusion, but I do need to know what day and time you prefer, and for how many people. Sentence12: I am looking for an expensive Danish place. Sentence13: Is there an expensive chinese restaurant in the centre? Sentence14: I am sorry I have no listings for that type of restaurant, is there any other type of food you would like? Sentence15: Booked at ugly duckling. Reference number: EQFGNMFY . Table will be held for 15 minutes. Sentence16: That was all I needed today thank you! Question: Who has spoken the sentence 10? (A) User (B) System
Answer: (A) User

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
Answer: (B) System

Sentence1: I'm looking for a place called soul tree nightclub. Sentence2: I also need a place to eat that serves Indian food. Sentence3: It's classified as a nightclub type of attraction. Sentence4: Soul Tree Nightclub is found in the center of town.The entrance fee is 4 Pounds and their phone number is 01223477900 Sentence5: Thank you good bye. Sentence6: I want to book a table for 6 at 18:45 on Thursday Sentence7: What type of attraction is it? Sentence8: Curry Garden in the centre of town was available. Booking was successful. The table will be reserved for 15 minutes. Reference number is : OTACG9MV . Sentence9: Fantastic. I have 22 restaurants for you to choose from! Sentence10: Thank you for allowing me to assist you. Have a great night. Question: Who has spoken the sentence 8? (A) User (B) System

Answer: (A) User