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: There are many leaving that day. What time would you like to leave? Sentence2: The TR5106 arrives in Cambridge at 23:23. The travel time is 163 minutes. Can I help you with anything else today? Sentence3: No thank you. I'm looking for a train that is departing from Birmingham New Street heading to Cambridge. Sentence4: I have 23 guesthouses that would meet that criteria. Would you like to narrow it down by area, stars, or price range? Sentence5: That is all I needed! Thank you so much. Sentence6: Can you help me find a guesthouse that includes free wifi? Sentence7: That would be great. Can I have the postcode, phone number, and if they have free parking? Sentence8: acorn guest house is a great place Sentence9: You're welcome! Have a great day! Sentence10: No thank you, I just need the arrival and travel time. Sentence11: The train should leave on thursday and should leave after 20:00. Sentence12: Great. I have a train that leaves at 20:40. Would you like me to book that for you? Sentence13: I'm looking to travel on thursday Sentence14: What day are you wanting to travel on? Sentence15: They do have parking available. I'm sure you'll love it. They're at 154 chesterton road, cb41da and their phone number is 01223353888. Want to book a room? Sentence16: Sure. I need something in the North, and I'd like a 4 star establishment. Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System