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: Hello! My friends told me about a hotel called Alexander Bed and Breakfast. Can you get me some information about it, please? Sentence2: They have internet, it has a 4 star rating, and the postcode is cb12de. Sentence3: It's my pleasure. Goodbye1 Sentence4: The TR5170's trip duration is 51 minutes, and it costs 18.88 pounds. Can I help with anything else today? Sentence5: Going to london kings cross. I want to leave after 10:15. Sentence6: do they have internet? how many stars does it have? and whats its postcode? Sentence7: What is your desired destination and timeframe for travel? Sentence8: I believe that will be everything. Sentence9: Have a great trip! Sentence10: Thank you. You have been very helpful. Sentence11: No thank you. I would like the travel time and price information if you can provide it, however. Sentence12: Yes she lives in. Barbers lost his son and and sleeps and eats a lot Sentence13: Great! I will also need a train. I need to leave on Saturday and depart from Cambridge. Sentence14: The TR5170 departs Cambridge on Saturday at 11:00 and arrives in London Kings Cross by 11:51. Would you like me to book that for you? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User