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: Departing from the hotel and arriving at the restaurant by 19:15. Sentence2: Now I need a taxi. Sentence3: You're welcome! I hope you have a wonderful trip! Sentence4: The postcode is cb41da. How else may I help you? Sentence5: Can you help me find a restaurant? I want to find a place in the centre. Sentence6: I want kirkwood house- I don't need a booking, just the postcode. Sentence7: yes, it will arrive by 19:15 Sentence8: And thank you for texting the cambridge towninfo centre. Take care! Sentence9: There are a few options in the centre ranging from cheap to expensive. Do you have a price range you would prefer? Sentence10: I have booked a taxi from kirkwood house to the dojo noodle bar for you. A white honda will pick you up. The contact number is 07516276037. Is there anything else I can help you with? Sentence11: I'm afraid there's none of those in the centre. Would you like to try and different area of town? Sentence12: I'll need a ride there. Can you arrange a taxi for me? Sentence13: Your booking was successful at dojo noodle bar. Your reference number is SB1NTSYB . Is there anything else I can do for you? Sentence14: Sure! There are plenty of restaurants in the centre to choose from. What type of food do you prefer? Sentence15: Thank you. I appreciated your assistance. Sentence16: Will the taxi arrive to the restaurant by the booked time? Sentence17: First we need to book you a hotel or guesthouse. Do you have any preferences for location or price? Sentence18: What about a restaurant that serves asian oriental food in the centre instead? Sentence19: no not really. why don't you pick one a reserve a table for 4 at 19:15 on wednesday please Sentence20: I'd like to find a vegetarian restaurant, if possible. Sentence21: Where will you be departing from? Sentence22: that will be okay for now thanks Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System