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

Positive Example 1 -
Input: Sentence1:i need a place to dine in the center thats expensive Sentence2: I have several options for you; do you prefer African, Asian, or British food? Sentence3: Any sort of food would be fine, as long as it is a bit expensive. Could I get the phone number for your recommendation?Question: Who has spoken the sentence 2? (A) User (B) System
Output: Answer: (A) User

Positive Example 2 -
Input: Sentence1: Guten Tag, I am staying overnight in Cambridge and need a place to sleep. I need free parking and internet. Sentence2: I have 4 different options for you. I have two cheaper guesthouses and two expensive hotels. Do you have a preference? Sentence3: No, but I'd really like to be on the south end of the city. Do any of those fit the bill? Sentence4: Sure. Does price matter? We can narrow it down and find exactly what you need. Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (B) System

Negative Example 1 -
Input: Sentence1: I am looking for a hotel named alyesbray lodge guest house. Sentence2: i have their info, what would you like to know? Sentence3: I would like to book a reservation for it. Can you help me with that? Sentence4: I sure can. First, I will need to know when you want your stay to begin and how many days you'll be staying. Also, how many people will be staying? Question: Who has spoken the sentence 1? (A) User (B) System
Output: Answer: (A) User

Negative Example 2 -
Input: Sentence1: Hi there! Can you give me some info on Cityroomz?. Sentence2: Cityroomz is located at Sleeperz Hotel, Station Road in the Centre area. It is a moderatley priced hotel with a 0 star rating. Would you like to book a room? Sentence3: Yes please. I need it for 7 people for 3 nights starting on tuesday. Sentence4: How many days would you like to book it for? Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (A) User

Now complete the following example -
Input: Sentence1: I am also looking for a train into cambridge the same day please Sentence2: Sorry. There are no moderately-priced 0 star places in the south of town. Do you want to try some other criteria? Sentence3: The booking was successful. Your reference number is 3UKMLIWO . Sentence4: It was a pleasure, thank you so much. Sentence5: Sunday as well, please. Sentence6: There are two places that match those requirements, one in the north and one in the city centre. Would you like to hear more about these? Sentence7: Okay. Can you purchase tickets for me. There will 6 of us. Sentence8: What day would you like the train? Sentence9: Yes, I need to leave Leicester after 11:00. Heading to Cambridge for the day. Sentence10: Hello, I'm looking for a place to stay that is moderately priced and a star rating of 0. Sentence11: Could you try for the center part of town? Sentence12: Are you sure there aren't any in the south of town? Sentence13: The cityroomz is a hotel in the centre part of town with a 0-rating in the moderate price range. Can I reserve a room for you there? Sentence14: Yes. Thank you for your help. Sentence15: I would recommend TR8285. It leaves Leicester at 11:09 and arrives in Cambridge at 12:54. Sentence16: Yes, I'd like to reserve it for 6 people for 4 nights starting Sunday, please. Sentence17: Your reservation was successful. Your reference number is SCKIYN5Q . You depart from Leicester at 11:09, arriving in Cambridge at 12:54. Would that be all for you today? Sentence18: Sure, where will you be departing from, and do you have a departure or arrival time? Question: Who has spoken the sentence 17? (A) User (B) System
Output: 


Answer: (B) System