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: Awesome. Thanks for all of your help. I have everything I need now. Sentence2: Thank you! From the hotel to the restaurant, please. Sentence3: Booking completed! Booked car type : black volkswagen Contact number : 07559655717 Can I help you with anything else today? Sentence4: Sure! When would you like to leave/arrive? Sentence5: The Lensfield Hotel is in the south. It is a 3 star hotel. Would you like me to book it for you? Sentence6: I am also looking for a restaurant, should be cheap and in the south, near to my hotel. Do you have any options? Sentence7: by the restaurant booked time. Sentence8: I have confirmed there are no international options, do you want to stick with nandos or run another search? Sentence9: I can help, where to and from, and what time? Sentence10: Thank you sir, I was starting to think this was a prank, you are set, your reference number is YNZ558E6, can I help with anything else? Sentence11: I also need a taxi to take me between the two places please. Sentence12: As I mentioned earlier, the only options in the south that are cheap are The Lucky Star (chinese) and Nando's (portuguese). Do you want me to search another area or price? Sentence13: Sorry, this is the husband, Im taking over the call, my wife is too indecisive. Please book us for Nandos at 13:45 on tuesday for 5 people, thank you. Sentence14: Can you just verify, is there an international restaurant in the south or no? Sentence15: I was goona ask to search for international, but it sounds like their isnt an option with a cheap price. Lets go with Nando's Sentence16: I have 2 choices. The Lucky Star serves chinese. And, Nando's is a portuguese restaurant. Which do you prefer? Sentence17: Can I get their postcode? Sentence18: Okay would you like to make a booking? Sentence19: Great, shall Il go ahead and book you then? Sentence20: rosa's bed and breakfast post code is cb22ha Sentence21: Are there no international places to dine in the area? Anything other than British food in the area? Sentence22: I need to find somewhere to stay in the south Sentence23: What is the price range? I'd like something in the cheap price range. Sentence24: I am glad that I can help. Have a nice stay. Sentence25: As long as it has free wifi I'll be happy! Sentence26: Then, I would recommend rosa's bed and breakfast, a cheap 4 star guesthouse. Do you need more information? Question: Who has spoken the sentence 17? (A) User (B) System
Output: 


Answer: (B) System