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: Great, book me one of those for 8 people. We'll stay from Friday for 5 nights. I'll need a reference number, please. Sentence2: We are happy to help. Thank you for using our service. Sentence3: Certainly, there are 8 guesthouse type accommodations in the north area that are 4 stars. Does parking or wifi matter to you? Sentence4: I need a train leaving friday that will arrive by 16:30 Sentence5: Sure book 1 ticket from kings lynn to cambridge Sentence6: I need a place to stay with a 4 star rating in the north please Sentence7: Booking was successful, the total fee is 78.4 GBP payable at the station. Reference number is : 59LWLXZ4 . Can I help you with anything else? Sentence8: No, I appreciate your help! Sentence9: I need booking for eight people if there is room. If so, book it and send a reference number. Sentence10: Now that we've specified, we have one that arrives at 14:58, the TR6844. Does this still work? Sentence11: Certainly, there are plenty of options, the train that arrives closest to 16:30 arrives at 14:43. Shall I book it, if so for how many riders? Sentence12: I am indifferent to parking but free wifi is a necessity. Sentence13: I booked you what you requested at the avalon hotel. Your reference number is J8LR3GIP . Can we help you with anything else? Sentence14: All the selections have wifi, 7 of the 8 hotels are moderately priced, but one is in the cheaply priced range. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User