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: Yes please. Can you book it for 2 people? We'd like to arrive Thursday and stay for 5 nights please. Sentence2: In the north, please. I'm looking for a guesthouse with free wifi, it can be 0 star. Sentence3: I have confirmed your reservation at city centre north b and b for 4 nights starting Thursday. Your reference number is GKZ1Z5LL . Is there anything else you need? Sentence4: Yes, I need it for two people and I need the reference number. I also need a guesthouse that includes free wifi. Sentence5: Yes 4 nights will work, can you book that and give me the reference number? Sentence6: We are happy to help. Thank you for using our service. Sentence7: I would like to find a taxi to the centre of Cambridge to an American modern restaurant. What would you recommend? Sentence8: I'm not able to secure 5 nights. I can book you for 4 nights 2 people starting on Thursday. Will that work for you? Sentence9: I've booked that for you. The reference number is F5TE3Q1H . As for the hotel, where in the city would you like to stay? Sentence10: I think I asked for that wrong...I'm sorry. I'd like to go to Peterborough from Cambridge on Tuesday after 14:00. Sentence11: How about the 14:19 train? It's a 50 minute trip, so you'll arrive at 15:09. Sentence12: The first available train that leaves after 14:00 from Cambridge to Peterborough on Tuesday is the TR7727. Would you like to go ahead and book a seat? Sentence13: City centre north b and b is a cheap, 0 star guesthouse located in the north with internet access. Would you like me to book this location for you? Sentence14: With so few details, I can't book you a taxi quite yet. Sentence15: I would like to book a train from Peterborough to Cambridge on Tuesday leaving after 14:00. Sentence16: No that is all. Thank you so much! Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User