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 also want a taxi Sentence2: at what time should it leave? Sentence3: i want to book a taxi to commute between the two places. Sentence4: Have a good day! Sentence5: I am traveling to Cambridge and looking forward to try local restaurants. Sentence6: That sounds lovely. I would like to book it for Saturday, for 7 people, at 14:15. Sentence7: Can we search for Portuguese instead? Sentence8: I would like a japanese place in the cheap range. Sentence9: Your booking for 7 at 14:15 was successful! The reference number is 38PZHLJO . May we help you with anything else? Sentence10: There's nothing matching that. Do you have any other criteria? Sentence11: Where to and from, and what time will you need the taxi? Sentence12: not now . i am also looking for a place to dine Sentence13: I recommend rosa's bed and breakfast. Could I book a stay for you? Sentence14: Do they have wifi? Sentence15: I have 2 guesthouses that match your criteria, do you have a price preference? Sentence16: I would be happy to help. There are lots of great restaurants in town! Do you what to try a particular type of food? Sentence17: Thank you, that is all I need. Sentence18: The most important thing is that it gets me to the restaurant in time for the reservation. I can leave the hotel whenever necessary. Sentence19: Okay. I've booked for you a yellow skoda. The contact number is 07314173329 Sentence20: There are several restaurants, what type of food would you like? Sentence21: There is one place available called the Nandos! Would you like for me to book a table? Sentence22: Okay, which place do you recommend? Sentence23: yes and they are a number without Sentence24: I still need to discuss restaurants details with a couple people first, can I start by looking for a 4 star place to stay in the south with free parking please? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User