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: Thanks so much. That was all I needed today. Sentence2: Did you have a certain time you needed to leave or arrive by? Sentence3: Booking was successful. Reference number is : K5MBWIXI . Sentence4: I want to book for 5 people, 4 nights, starting from sunday. Sentence5: I would like to leave cambridge and arrive by 20:15. Sentence6: you leave at 7 and arrive by 7 51. Sentence7: The travel time is 51 minutes. As far as that hotel goes, it's a moderately-priced 4-star guesthouse on the east side. Sentence8: What is the travel time? I'm also looking for information on a hotel, carolina bed and breakfast. Sentence9: I could suggest train TR8636, which arrives by 07: 51, should I book? Sentence10: I don't need the booking yet. You've already give me the train ID. I just need the departure time and the travel time. Thanks. Sentence11: Can you help me find a train going to london kings cross leaving on thursday? Sentence12: If you need anything else, please contact us. Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User