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: Sorry, no results for that search. Would you like to try a different area or price range? Sentence2: Are there any expensive restaurant that serves American, anywhere in the city? Sentence3: I am sorry, there are no restaurants that serve food from the americas either. Sentence4: Yes, please book for 4 nights on Thursday for 1 person. Sentence5: What are the expensive Chinese restaurants that are available? Sentence6: There are no expensive Chinese restaurants in the west, which would be close to your hotel. Would you like to try a different area? Sentence7: Could you double check for Chinese food? Sentence8: Would you prefer british, indian, thai or european cuisine? Sentence9: After checking again, I do have 1 that serves North American food in the centre area. Would that interest you? Sentence10: Yes it does. Shall I book? Sentence11: Your booking is complete your reference number is WYDAYXH4 they will only hold the table for 15 minutes. Sentence12: What price range and area of town are you looking for? Sentence13: That is everything. Thank you so much for your help. Sentence14: I need a place to stay. It needs to be a hotel that has free wifi. Sentence15: There are none. Would you like to change either your cuisine preference, or try a moderate? Sentence16: How many people would you like that booking for? Sentence17: It will be just me, myself and I! Sentence18: How about one that serves food from The Americas? Sentence19: The Huntingdon Marriott Hotel is on the west and is a 4 star hotel with wifi. Would you like to book a room? Sentence20: Great! Yes, I also need to find an expensive restaurant close to the hotel. Sentence21: Maybe. Does it have free parking? Sentence22: I am glad I could help you. Have a great trip. Sentence23: Is there one that happens to serve Chinese food? Sentence24: Yes please book that for one person on thursday at 12:15. Sentence25: Reference number is : 42UHJQT1 . Anything else? Sentence26: Price does not matter. I want something on the west. Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User