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 have confirmed your taxi departing from allenbell at 21:15 to shanghai family restaurant. The contact number is 07779063338. Is there anything else we can help you with? Sentence2: Do you have a preference for the hotel's area or price range? Sentence3: The area doesn't really matter, but I would like something cheap. Sentence4: Hello I'm looking for the shanghai family restaurant. Sentence5: You're welcome. Good-bye. Sentence6: What is your destination? Sentence7: I have both the Autumn House and the Allenbell. They are both guesthouses on the east side of town with a 4 star rating. Should i book one for you? Sentence8: The booked Car type is a Red Toyota. Sentence9: I don't have a particular destination for my taxi. Sentence10: I'm sorry, but I cannot provide you information on the taxi without knowing your destination. Sentence11: The postcode is cb11dg. Sentence12: I need to get from the allenbell hotel to the shanghai family restaurant, please. Sentence13: Yes I would like to stay on the east side of town. Sentence14: Yes, I also need the car type. Thank You Sentence15: I have at least 8 hotels that might suit you. They all have internet, a 4 star rating and are in the cheap price range. Do you have a preference for what part of town you stay in? Sentence16: Can you find me a 4 star hotel? Sentence17: I'm sorry, but I don't have any hotels that match that criteria. Would you like to change your requirements? Sentence18: I will als require a taxi. I need to leave the hotel by 21:15. Can you provide he contact number and the type of car please. Sentence19: The Allenbell is fine. Could you book a stay for 7 people, starting on Tuesday, for 4 nights? I also need a reference number. Sentence20: Great I am also looking for a hotel with a 2 star rating that has free parking. Sentence21: Can you tell me the postcode? Sentence22: Yes I got it, what can I do for you sir? Sentence23: Thank you so much for all of your help, have a great day! Sentence24: Booking was successful. Reference number is : AVPKTYBJ . Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System