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'm looking for a moderately priced place to stay. Sentence2: A grey Skoda has been booked to pick you up. Their contact number is 07015780256. What else can I do for you? Sentence3: Let's go with a 4 star hotel, I'll need 5 nights for 2 people, starting on Friday. Sentence4: Yes, I am going to need a taxi to go between the two places. I need it to arrive in time for dinner. Sentence5: I would prefer it to be in the north. Sentence6: I would recommend golden wok. shall i book it ? Sentence7: You have eleven choices in the north. Most are guesthouses, two are hotels. Sentence8: You've done it all, thanks so much. Sentence9: I would like to stay in the north part of town. Sentence10: There are 4 moderately priced Chinese restaurants to choose from. Would you prefer to dine in the north or centre? Sentence11: There are 33 moderately priced accommodations. Do you have a specific area or star rating you're looking for? Sentence12: Have a wonderful trip. Sentence13: Booking was successful. The table will be reserved for 15 minutes. Reference number is : 093R1Y1T . Is there anything else I can help you with? Sentence14: Yes, please book friday at 16:00 for 2 people. And tell me the reference number Sentence15: Okay. I booked you at the 4 star Ashley Hotel for 5 nights and your reference number is 67NA9WLR . Sentence16: Thank you. I am also looking for a Chinese restaurant with the same price range as my hotel. Can you help me with that? Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System