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: Well Christ's college is quite famous and is free to enter. Sentence2: Have a great day! Sentence3: Do any of the hotels offer free parking? Sentence4: There are 9 moderately priced hotels to choose from. Any other requirements to narrow down your choices? Sentence5: there are five guesthouses that have free parking. Sentence6: Great I got a white skoda phone number 07971687645 Sentence7: Unfortunately, I don't happen to have anything in the north that is expensive. Is there another price range or area I can try for you? Sentence8: Thank you for your help.Bye. Sentence9: I'll take the highest rated one of those. I need 4 nights starting Tuesday for 7 people, please. Sentence10: How about a moderately priced one? Sentence11: Yes. I'd like to book a taxi to get there. Sentence12: It is located at Saint Andrew's Street, cb23bu. Is there anything else that I can do for you? Sentence13: I would like to leave Christ's college by 19:00. Sentence14: That sounds nice. Can you please give me the address, including the postcode? Sentence15: I would like to stay in the north. Sentence16: I have booked you in the highly rated Acorn guest house for 4 nights beginning Tuesday. The reference number is FK8743UH . Is there anything else I can help with Sentence17: Yes, I would also like to find a place to stay, expensive price range, but with free parking. Sentence18: There are 5 hotels that meet this criteria. What part of town would you prefer to stay in? Sentence19: Yes I am looking for a college to visit. Can you help me? Sentence20: Absolutely, what time would you like to depart from the college? Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System