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: You're very welcome! Can I help you with anything else? Sentence2: I was able to book the taxi arriving at nandos by 14:30. It will be a yellow ford and the contact number is 07126119012. Sentence3: Great! Thank you so much! Sentence4: If you are looking for an inexpensive restaurant in the south there is a Chinese one and a Portuguese as well. Do you have a preference for price or style? Sentence5: Yes, I would also like free parking and prefer a guesthouse. Sentence6: There is only Chinese or Portuguese available Sentence7: I found Rosa's Bed and Breakfast matching your request. Would you like me to book that for you now? Sentence8: book it for the same number of people at 14:30 on the same day Sentence9: Nandos is booked with the reference number 38RU5UDA .The table will be reserved for 15 minutes. May I help with something else? Sentence10: The restaurant is Nandos. I think you'll really like it. It's cheap and in the south area of town at Cambridge Leisure Park Clifton Way, post code cb17dy. Sentence11: No that is it. Thank you. Sentence12: Yes please. Book it for 4 nights for 8 people starting this Friday Sentence13: I was also hoping to find a restaurant in the same part of town as the hotel. Sentence14: Greetings, I'm looking for a hotel to stay at on the southend. Sentence15: Yes, I need a taxi to the restaurant, I want to get there by the booking time. Nice car, no clunker please. Sentence16: I have one listing for rosa's bed and breakfast, would you like other information or like me to make a booking? Sentence17: You are welcome, enjoy your day. Sentence18: I would like it to be cheap. Sentence19: The restaurant should be in the same price range as the hotel and I would like a restaurant that serves barbeque food Sentence20: Tell me about the Portuguese restaurant Sentence21: I have reserved your room. The reference number is 0L7YKIHN . Can i do anything else for you today? Sentence22: Do you have a price range? Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System