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 sorry, none of the hotels in the centre are free on those dates. Would you like to try a different number of days? Sentence2: Your booking at the Alexander bed and breakfast was successful, the reference number is L60GOSEU . Sentence3: Just about every lodging in town has internet (it's 2017, after all!). Do you have a certain area or price range in mind? Sentence4: Sure. What time would you like to be picked up from Cambridge Arts Theatre? Sentence5: Thank you Goodbye Sentence6: It needs to be in the same area as theatre and have free parking. I don't care about the price. Sentence7: I don't really care. Can you suggest something? Sentence8: I have booked a black BMW to pick you up. The contact number is 07334398349. Sentence9: That's all for today. Thanks for your help! Sentence10: Can you try for just 2 nights then? Sentence11: I'd actually like to be picked up from Alexander bed and breakfast by 15:30. Sentence12: How about a theatre? Can you give me the post code and phone number for one, please? Sentence13: I will be in Cambridge and am looking for some places to go in the centre while I visit. Sentence14: Can you book it for me? Just for one person starting on Wednesday for 5 nights. Sentence15: Thank you! Can you help me find a hotel to stay in? I need it to have free wifi. Sentence16: The Cambridge Arts Theatre is located at 6 saint edward's passage in postcode cb23pj. Their phone number is 01223503333. Sentence17: Can I please book a taxi to get to the hotel? Sentence18: I'd be happy to help you pick one! There are over 40 attractions in city centre; what type of activity are you interested in? Sentence19: How about a museum? Or we have some terrific colleges you could visit. There's always the theatre as well. Sentence20: Okay its address is located at 6 saint edward's passage and its postal code is cb23pj. Question: Who has spoken the sentence 18? (A) User (B) System
Output: 


Answer: (A) User