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 need a place to stay and I want it to be a guesthouse. Sentence2: Thank you. Can you also help me find a restaurant that is expensive and in the same area as the hotel? Sentence3: Thanks a lot goodbye Sentence4: I like the south part of town and should include free wifi Sentence5: Yes, please book for Thursday for 2 nights and 3 people. Sentence6: Mexican sounds good. Please book it for the same day --Thursday and for the same three people at 17:30. Sentence7: Does either have free parking? Sentence8: Your booking was successful they will hold your table for 15mins. Your reservation number is YOLN1H2G . Is there anything else I can help you with? Sentence9: I have the aylesbray lodge, bridge guest house or rosa's bed and breakfast. Would you like to book one today? Sentence10: aylesbray lodge guest house to chiquito restaurant bar Booking completed! Booked car type : yellow bmw Contact number : 07430668137 Sentence11: Perfect, thanks! Can you also find me a taxi to commute between the two places? I'd like to get to the restaurant in time for that reservation. Sentence12: I was able to book aylesbray lodge guest house for you. Your reference number is NIFUTFQF . Sentence13: Yes, they both do. Shall I book one? Sentence14: There are 24 guesthouse listings. What area would you like to stay in? Sentence15: Would that be all? Sentence16: There are 5 expensive restaurants on the south side. You can pick from Chinese, Indian, Italian, or Mexican. Mexican one is chiquito restaurant bar. Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System