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: Happy to be of service, and thanks for using the Cambridge TownInfo centre! Sentence2: Yes, Cityroomz does have free wifi. Is there anything else I can help you with? Sentence3: Yes I was interested in European food in expensive price range Sentence4: Their phone number is 01223368786. Is their anything else I may assist you with? Sentence5: Eraina is a great european restaurant in the centre of town. It's located at Free School Lane City Centre. Would you like their phone number? Sentence6: That's all I needed today, thank you. Sentence7: I would like more information on a hotel called cityroomz for my trip to Cambridge. Sentence8: I also would like information on a place to eat in the centre of town. Sentence9: Yes please, I would like their phone number. Sentence10: No, I just need to know if they have free internet. Sentence11: Cityroomz is a moderate priced accommodation, located in the city centre, on Station Road. May I assist with a booking? Sentence12: I can definitely help you with that. Was there a specific type of cuisine you were interested in? Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User