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: Anything is fine. I need a reservation for 2 at 11:15 on Monday. Sentence2: Yes, can you tell me how much is the entrance fee? Sentence3: Sweet, I will head there now. Thank you that is all I need, you have rocked my world. Sentence4: Glad to be of assistance. Is there anything else I can help you with today? Sentence5: No, that's all I needed. thanks again. Sentence6: No problem! Enjoy yourself. Sentence7: Thank you so much for your help. Sentence8: Can you help me find a british restaurant in the centre? Sentence9: Downing College has a free entrance fee. Sentence10: The reservation at The Copper Kettle on Monday at 11:15 for 2 people was successful. Your Reference number is : PLRLM5II . Sentence11: Any time more than happy to help. Sentence12: that is located at the centre Sentence13: There are 7 moderate and expensive restaurants in the centre; do you have a price range you prefer? Sentence14: Can you please give me some information about downing college? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System