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: No thank you, that is all I need right now. Goodbye. Sentence2: Of course, thanks! I'll be traveling on Tuesday, departing from Stevenage. Sentence3: The entrance fee is free and its located in the west area. Churchill college is a college. Sentence4: Okay, and is there anything else you need help with or will that be all? Sentence5: I need a train for tuesday leaving after 13:15. Do you have one? Sentence6: Yes, it is located in the west. Address is Storey's way. It is free to enter. Sentence7: The ID is TR1830 and it leaves at 13:54 and arrives by 14:43. Do you want me to book it? Sentence8: I have 229 results for trains leaving after 13:15, could you be more specific on where you want to depart/arrive and what day you are traveling? Sentence9: Thank you for contacting Cambridge TownInfo Centre. Have a great day! Sentence10: That sounds good. Can I get the train ID and the departure/arrival times? Sentence11: Just want to make sure I understand you correctly, Churchill College is a college, but what type of a attraction is it? Is it a college museum? Sentence12: The travel time for TR1830 is 49 minutes. What would you like to know about churchill college? Sentence13: What sort of place is it, and what area of town is it in? Sentence14: No thank you. Sentence15: First train leaves at 13:54 on tuesday Sentence16: It appears to be listed as a college in the West. Is there any other information on it you would like? Sentence17: Not right now, thanks. But can you tell me a little about Churchill College? Sentence18: Great, and what type of attraction is Storey's Way? Also, backing up a bit, can you give me the travel time for Train TR1830? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System