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: That was everything, thanks! Sentence2: I can help you with that. What type of cuisine would you be interested in? Sentence3: You're welcome, enjoy your time in Cambridge. Sentence4: I'm sorry, there aren't any entertainment attractions in the centre of town. Would you be interested in a different kind of attraction, or perhaps somewhere in another part of town? Sentence5: There are 2 restaurants serving international food. One is the varsity restaurant, the other is bloomsbury restaurant. Would you like a reservation at one of these? Sentence6: Thank you. Can I also book a taxi from the restaurant to the club? Sentence7: The Soul Tree is located at 1-6 corn exchange street. Sentence8: I would like to book a table for 2 at 11:45 on Thursday at Bloomsbury. Sentence9: I am looking for a place to eat. Do you know any places in the centre of town with a moderate price? Sentence10: Are there any nightclubs in the centre of town? Sentence11: I need to arrive before our reservation time. Sentence12: I would like the restaurant to serve international food. Sentence13: Yes could I have their address please? Sentence14: I have booked a taxi for you. It is a red ford and the contact number is 07592537181. Is there anything else you need today? Sentence15: What time would you like to leave or arrive? Sentence16: Yes, there are 5 results for nightclubs in the centre area. The cheapest entrance fee is 4 pounds and that's at soul tree nightclub. Do you need more information? Sentence17: Thank you. Can you also find me an entertainment attraction near Bloomsbury? Sentence18: Sure, I have made the reservation, and your reference number is W6A0B2QE . Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System