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: Their phone number is 01223503333, and their postcode is CB23PJ. Can I help you with anything else? Sentence2: Thanks for the theatre info. Let's go back to the restaurant search. I feel like Spanish food, in the moderate price range, please. Sentence3: Can the taxi pick me up from the Cambridge Arts Theatre. Sentence4: Where would like the taxi to take you? Sentence5: La Tasca sounds perfect for you. Would you like me to book it? Sentence6: That's all for now. Thank you for all your help. Sentence7: I will also need to book a taxi. Sentence8: You are booked with reference number NK0DZ1YI . Anything else? Sentence9: yellow audi Contact number : 07845910981 Is there anything else I can assist you with? Sentence10: Ok. I will be happy to help you with that. Where will the taxi pick you up? Sentence11: Yes, please book for 5 people on tuesday at 14:30. And I will absolutely need a reference number from you Sentence12: Hello, can you recommend local restaurants? Sentence13: Great, thanks for letting us help you! Sentence14: I have many options for restaurants in the area. Is there a certain type of food you would like me to find information on? Sentence15: To La Tasca, by 14:30 Sentence16: No. I am interested in the Cambridge Arts Theatre. Can you provide me with the phone number and postcode? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System