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 to leave after 11:30 on tuesday. I'm traveling to cambridge. Sentence2: That is all thank you goodbye Sentence3: I need to book a train leaving from London Kings cross. Sentence4: The only Italian place in the east is Pizza Hut Fen Ditton. Would you like more information? Sentence5: Your reservation is all set! Your reference number is EV3K4Q4D . Is there anything else I can help you with? Sentence6: i want to book a table for 4 people at 21:00 on the same day as the train. Sentence7: Can you find me a restaurant that serves afghan food and is located in the east? Sentence8: Yes, it's 23.60 pounds per ticket. Sentence9: How about Italian food? Sentence10: I'm sorry we don't have any Afghan restaurants in the east area. Would you like to try a different type of food or a different area? Sentence11: I have 6 entires. TR3456 leaves at 13:17. Does that work for you? Sentence12: Yes can I get the price on that? Sentence13: What day were you wanting to travel on? Sentence14: Okay great. I'm glad I could be of help. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User