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: Is there anything else I can do for you? Sentence2: nope, that's it thanks! Sentence3: Certainly! Their address is 56 Saint Barnabas Road. Is there anything more I can help you with? Sentence4: Thank you, please. Sentence5: Thank you very much for your help today! Sentence6: Let me check into that for you. Sentence7: I also need a train arriving by 17:45 on Sunday. Sentence8: Could you please let me know when that departs and what the total travel time is? Sentence9: Have a wonderful day! Sentence10: That departs at 15:21 and the total travel time is 105 minutes. Sentence11: How about TR7423? it leaves at 0500 Sentence12: I'm looking for a expensive guesthouse. Sentence13: Alexander bed and breakfast is available, would you like to book it? Sentence14: Sure, I'll go with a cheap one. Sentence15: I'm afraid not. Would you prefer a cheaper one, or perhaps a hotel? Sentence16: How silly of me to recommend an early morning train when you need to be there in the afternoon, I apologize TR9992, arrives by 17:06, interested in tickets? Sentence17: No, I don't need to book at the moment, but I would like the address. Sentence18: Sorry the train should arrive in Leicester by 17:45 and depart from Cambridge on Sunday. Sentence19: Are there any expensive guesthouses in any area? I just need it to have free parking. Sentence20: Would you settle for a moderately priced 4 star? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User