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

Ex Input:
Sentence1: No thank you. Can I have to phone number and postcode for that restaurant? Sentence2: I need a train to Kings Lynn. Sentence3: Thank you for using our service. Sentence4: The earliest train leaving after 17:00 on Friday leaves at 17:11. Would you like me to book this train for you? Sentence5: That would be TR9226 Sentence6: The phone number is 01223247877. It's located in the cb13nl postcode. Sentence7: Hmmm....how about an expensive restaurant serving gastropub food in the east? Sentence8: Thank you, goodbye. Sentence9: I am looking for a restaurant in the east that serves international food. Sentence10: No. There are two moderately priced restaurants with international cuisine in the centre of town. Would you like to hear about those? Sentence11: Book it, please. I need a single ticket. Sentence12: The the missing sock fits that criteria and is in the cheap price range. How else can I assist you? Sentence13: What day would you be wanting to travel? Sentence14: There's one restaurant that fits your requests, would you like me to book a reservation? Sentence15: Thanks again for the information! Sentence16: Have a great time. Sentence17: Have a great day as well. I think you'll love the Royal Standard. Sentence18: Thank you so much. Have a nice day! Sentence19: Friday please. From Cambridge leaving after 17:00 Sentence20: Can you give me the train ID on that one please? Sentence21: Is there one in the expensive? Sentence22: You have been booked for the train. Your reference number is 0UIC4MX9 . Can I help you with anything else? Question: Who has spoken the sentence 20? (A) User (B) System

Ex Output:
Answer: (A) User


Ex Input:
Sentence1: Hi, I just had a fight with someone regarding an automobile accident we had and I need to contact the police! Sentence2: I have the parkside cambridge police telephone 01223358966. Sentence3: always welcome. at your service Sentence4: Thank you, Goodbye Sentence5: I'm not sure where you are, but the police postcode is CB11JG. Sentence6: Can I get the zip code or postal code for the area I'm in right now? Question: Who has spoken the sentence 3? (A) User (B) System

Ex Output:
Answer: (B) System


Ex Input:
Sentence1: I am also looking for a restaurant in the centre in the expensive price range. Sentence2: No, problem, I just need to know what time you wish to get there and where you'll be arriving from. Sentence3: Curry Garden is a nice indian restaurant in the Centre. Should I book you any tables? Sentence4: Okay, you'll be picked by a black lexus. Their contact number is 07229815705 Sentence5: I just need the area it is located in and the phone number please. Sentence6: it is a college situated in the west, do you need the address? Sentence7: Can you also book a cab to get me to the restaurant in time for my reservation? Sentence8: Can you provide information about Clare Hall? Sentence9: I have many restaurants. Is there a type of food you would enjoy? Sentence10: You are very welcome. Goodbye. Sentence11: okay, how about indian food. Sentence12: unfortunately, i do not. are there other cuisines that you like? Sentence13: That sounds nice, can I get their phone number please? Sentence14: Sure, the phone number is 01223302330. Is there something else I can help you with today? Sentence15: I really love mexican. Do you have one that serves that? Sentence16: I want to leave the restaurant by 11:45. Going to Clare Hall. Sentence17: Wonderful, you made me excited for this trip now can't wait!, That is everything, thank you. Sentence18: It's located in the west and the phone number is 01223332360. Is there anything else I can help you with today? Question: Who has spoken the sentence 3? (A) User (B) System

Ex Output:

Answer: (B) System