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 have 31 moderate priced restaurants. Is there a certain cuisine or area of town you would be interested in? Sentence2: Pizza hut cherry hinton looks pretty good. Would you like me to make you a reservation? Sentence3: OK. Is there anything else you'd like to know, about the train or about anything else? Sentence4: I need some information on a train going to stevenage. Sentence5: Thank you, that's all I need today! Sentence6: What time would you like to leave or arrive? Sentence7: Booking was successful. The table will be reserved for 15 minutes. Reference number is : L0NMNTY2 . Sentence8: I'm interested in an Italian restaurant. What would you recommend in the moderate price range? Sentence9: I would like to find a restaurant in the moderate price range. Sentence10: Can I look anything else up for you today? Sentence11: I have to leave Cambridge after 13:00. Sentence12: That is fine. Can I get the price for a ticket please? Sentence13: No thank you have a nice day. Sentence14: Thank you for your help. Sentence15: I will be departing from Cambridge on Sunday. Sentence16: Yes, for 8 people at 10:15 on Sunday Sentence17: TR6488 departs Cambridge on Sunday at 9:21 and arrives in Stevenage by 10:10. Would this work for you? Sentence18: We have many trains leaving to Stevenage at all times. Can I get your point of departure and day of travel? Sentence19: Sure, that ticket costs 10.24 pounds. Do you want me to book it? Sentence20: Not just yet. I am just getting some information for now. Sentence21: How about TR0523 departing at 13:21 and arriving in stevenage at 14:10? Sentence22: That's too early. I need an afternoon train. What do you have later on? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User