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: Are any of them in the cheap price range? Sentence2: Which one would you recommend? Sentence3: zizi cambridge is available. It is also a cheap Italian restaurant in the centre. Your reservation is for Wednesday at 17:15 for 6 people. Your reference number is CRW6R09Z . Sentence4: Another, same area and price range please. Sentence5: As long as it's in the same area and price range, I guess I can try it. Please book it for 6 people at 17:15 on wednesday. Sentence6: You have your choice of Pizza Hut City Centre, Stazione Restaurant and coffee bar, Pizza Express, Ask, or Zizzi Cambridge. Sentence7: Can you find me an italian restaurant that is in the centre? Sentence8: Great thank you for your help that's all I needed today. Sentence9: I'm sorry, a table was not available. Would you like to try another restaurant? Sentence10: Have a great day! Sentence11: Pizza hut, ask and Zizzi all appear to be in the cheap price range, Would you like me to book one? Sentence12: I recommend Ask. Do you want me to book it for you? What day and time do you want to eat? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System