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: Both trains cost 10.10 pounds per ticket. Sentence2: I am looking for a restaurant to dine at in the centre of town. Could you recommend me any expensive places to try? Sentence3: Yes several. I'd recommend the Cambridge Chop House,Midsummer House Restaurant or Fitzbillies Restaurant Sentence4: I found two trains that will do that, one will leave at 5:40, and one will leave at 6:40, which would you like to book? Sentence5: I think I'm all set. Thank you very much! Sentence6: I found 404 trains leaving on Friday. What is your departure and destination locations? Sentence7: All three serve British Cuisine. Sentence8: No problem! Have a great trip! Sentence9: I'll be going to stansted airport from cambridge, and I need to arrive by 8:00. Sentence10: As long as it will be arriving by 08:00 it doesn't really matter which one, but I need the price of each ticket please. Sentence11: Great thank you so much. Sentence12: Would you still like me to book a ticket for you or are you satisfied at this point? Sentence13: What type of food do those places serve? Sentence14: Alright, would you also be able to help me find a train? I'm looking to leave on Friday. Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System