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: I would like an expensive Indian restaurant in Cambridge please, the area is not important. Sentence2: I'm sorry but there are no restaurants that serve crossover food. Would you like to choose something different? Sentence3: Can you help me find a very expensive place to eat that serves crossover food? Sentence4: I would like to leave by 24:30. Sentence5: Thank you. I will need a taxi to get from the restaurant to the boat. Can you book that for me? Sentence6: What time would you like to leave and arrive? Sentence7: If you would like a suggestion, there is a nightclub called the Club Salsa that is always a very popular venue in the centre of town. Would you like more info? Sentence8: How about scudamores punting co, it's a gorgeous boat. Address is granta place, mill lane, postcodecb21rs, phone number 01223359750. Sentence9: What interests you: museums, architecture, theater, cinema? Sentence10: I recommend The Golden Curry in the centre. Would you like me to book a table for you there? Sentence11: No, anything but a night club. What else can you recommend in the centre area? Sentence12: We love our indian food in cambridge, there are 14 restaurants to choose from. Did you have a location in mind to help narrow it down? Sentence13: How about an Indian restaurant? Sentence14: I enjoy all of those. Could you make me a recommendation? Sentence15: That will be all, thank you for your help. Have a great day! Sentence16: My pleasure, enjoy your stay! Sentence17: Okay, I've booked you a grey volkswagen and the contact number is 07525319116. Is there anything else I can help you with today? Sentence18: No at this time. I'm also looking for attractions in the centre area. Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System