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: There are three expensive European restaurants in the Centre area. Would you like to know the name and address of each location? Sentence2: Absolutely. Your reference number is FXDNF0IU . What else can I help you with? Sentence3: Can I have the reference number please? Sentence4: I would like the hotel for two nights, starting on Thursday. Sentence5: Hi! Are there any European restaurants in the center of town? Sentence6: Yes, there are 8 results for European restaurants in town centre, what price range are you looking for? Sentence7: Very, very insanely expensive, money is no object. Sentence8: Yes, I need a hotel for 4 people with free parking in the expensive price range, for 2 nights Sentence9: You are booked at the Gonville Hotel your reference number is LIA4E1ME . Can I help you with anything else? Sentence10: If you need anything else, please contact us with your needs. Sentence11: Thank you for using our service. Have a great night. Goodbye. Sentence12: Success! We've booked your reservation Sentence13: Yes thank you Sentence14: No, that is all. Thank you so much for the assistance. Sentence15: Eraina is at Free School Lane CIty Centre, phone #01223368786. Would you like me to make a reservation? Sentence16: Yes, I need a reservation on Thursday at 16:30 for 4 people. Sentence17: That is all. Thanks so much for your help! Sentence18: And what day would you like the reservation for? Sentence19: A hotel and should include free parking, in the expensive price range,for same group for 2 nights Sentence20: Is there anything else I can help you with? Question: Who has spoken the sentence 17? (A) User (B) System
Output: 


Answer: (B) System