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: That is great, that is all I need for now. Sentence2: pick one for me and i would need the address and entrance fee Sentence3: Terrific. I'm glad I could help. Have a great trip. Goodbye. Sentence4: Are there any museums on the West side? Sentence5: people's portraits exhibition at girton college has free entrance and is located at girton college, huntingdon road, can i give you the phone number? Sentence6: The TR420 is 14.08 pounds. How is that? Sentence7: No that's all I needed. Can you find me a train that arrives to Cambridge by 8:45 from Norwich? Sentence8: I have many options that meet that criteria. Would you like to narrow it down by departure time or day of travel? Sentence9: There are 3 trains on Sunday, arriving at 06:35, 07:35, and 08:35. Which one would you like to book? Sentence10: Yes, there are 7! What type of museum would you like to visit? Sentence11: Actually, I don't need to book just yet. Could you tell me the price and the id of the train arriving at 08:35? Sentence12: I'd like to arrive by 08:45 on sunday. Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User