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: Certainly, how about riverside brasserie is in the moderate price range, serves modern European and it is in the Centre area. How many people shall I book it for? Sentence2: could you be a little more specific please; what day do you want to leave, and when do you want to leave? Sentence3: Can I assist you with anything else today? Sentence4: I found 10 trains, do you have any time you need to arrive by? Sentence5: No, I just need to leave after 13:45. Give me which ever one is earliest. Sentence6: I am looking for a modern European restaurant in the moderate range. Sentence7: I'd like to leave after 13:45 on thursday from cambridge to stansted airport. Sentence8: Not at this time, no. I just needed the information, thank you. Sentence9: Excellent. Have a good day! Sentence10: Let me think on that, could you help me book a train? Sentence11: Sure, you can choose. As long it's in the moderate price range and serves modern European food, can you tell me what area it is in please? Sentence12: I have three restaurants that meet your criteria - Restaurant Alimentum, De Luca Cucina and Bar, and Riverside Brasserie. Would you like to book a table at one of these? Sentence13: That is everything. Thank you! Sentence14: The earliest one I have leaving is 14:40 and arriving at 15:08. Would you like me to book this for just one person? Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System