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: Sure. 2 people at 20:30 on Tuesday. Please give me the reference number. Sentence2: Nope that should be it thank you Sentence3: There are many trains leaving after 11:15, the closet one leaving to that time will be at 11:40 and arrives at 14:23. Sentence4: Your request has been completed. The reference number is TTH2AA7N . Sentence5: I am looking for a train departing after 11:15 from the Birmingham new street location. Sentence6: Will that be 1 ticket on the 13:40 train from birmingham new street to cambridge, then? Sentence7: Alright, you're all booked! The reference number is LW1N1DLA . Is there anything else I can help you with today? Sentence8: Okay, I need one going to Cambridge on Tuesday. Sentence9: Thank you, if you need anything else please contact us. Sentence10: No, actually I'll need tickets for two people please. Oh, and can you provide the reference number when you've got it please? Sentence11: What is your preferred arrival time? Sentence12: I have 2 results for mediterranean restaurants. One is la mimosa in town centre. Would you like me to make you a reservation? Sentence13: Thanks. I also need an expensive restaurant serving Mediterranean food. Sentence14: I don't have a preferred arrival time. Could you just book me one for 13:40? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User