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 want the one in the north please Sentence2: Yes, the arbury guest house offers internet Sentence3: I have you booked for a room on Wednesday, for 5 nights, for two people. Your reference number is JHI0YPSS . Would you like help with anything else? Sentence4: That sounds like a good option! Does it include internet? I won't be needing it during my stay, but I'd like to know. Sentence5: There are four! 3 in the centre, and 1 in the north! Sentence6: looking for a restaurant. The restaurant should serve chinese food and should be in the same price range as the hotel Sentence7: Ok. Can we look for something on the north side? Sentence8: Thank you for contacting us and have a nice day. Sentence9: A blue tesla will be picking you up in time to arrive at the restaurant by 18:45. Their Contact number is 07398063187. Is there anything else I can assist you with? Sentence10: golden wok is what you're looking for, can i book it for you? Sentence11: Could I also get a taxi to go from the hotel to the restaurant please? Sentence12: Booked! The reference number is V9O804ND . Is there anything else I can help you with today? Sentence13: Yes, please book golden wok for 2 people at 18:45 on Wednesday. Sentence14: I would like to find a guesthouse to stay in that's in the expensive price range. Can you help me? Sentence15: That is all, thanks. Sentence16: How many people and how many days would you like to book for? Sentence17: There are several moderately priced guesthouses in the North. Arbury Lodge, perhaps? It has a 4 star rating. Sentence18: There are zero guesthouses in the expensive range. Would you like to explore hotels or other price ranges? Sentence19: Please book for 2 people, for 5 nights, starting from Wednesday. Sentence20: Can you book it for me? Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System