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: Certainly! Have a nice day and contact the Cambridge TownInfo centre whenever you like! Sentence2: I will take care of that myself. Could you find me a train going to norwich arriving by 12:45? Sentence3: I would like to book a total of 6 tickets. And can I please get the reference number. Sentence4: The address is 83 Regent Street, postcode cb21aw. What day and time would you like to book? Sentence5: I leave on Wednesday, departing from Cambridge. Sentence6: I'll be happy to help. I need to know the day and your departure site, please? Sentence7: Unfortunately there is none there as well. Can I broaden your search further? Sentence8: I would really prefer Jamaican. Are there any in the centre part of town? Sentence9: Please book that train. Sentence10: I was able to successfully book your tickets for train TR9635. Your reference number is 6144V7BE . Is there anything else I can help you with? Sentence11: TR9635 will depart cambridge at 10:36 on wednesday and arrive in norwich at 11:55. Would you like me to book tickets for you? Sentence12: No. Thank you very much for your help. Sentence13: I want to eat. I am looking for a Jamaican restaurant with a moderate price range please. Sentence14: Of course, how many tickets would you like me to book? Sentence15: Okay, well how about one that serves modern European food in that area? Sentence16: Yes, that would be great and can you give me the postcode and their address please? Sentence17: I'm sorry, there are no moderately priced Jamaican restaurants. What about a different food type? Sentence18: I have two modern european restaurants in the centre. Would you like to book at de luca cucina and bar? Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User