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: No, Friday works for me. Sentence2: Sure! The Booking was successful. Reference number is : 1JL8B2K4 . Sentence3: okay thank you! What is the travel time on that? Sentence4: Okay, great. Can I help you with anything else today? Sentence5: Please book it for 6 people for 2 nights starting on Wednesday. Sentence6: I want information on a particular hotel called home from home. Can you send me what you have on that? Sentence7: No thanks that is all I need. Sentence8: Have a lovely day, goodbye. Sentence9: Yes I can. Please tell me your departure city, day and time and I'll see what I dig up. Sentence10: This train actually leave on Friday. You wanted to leave on Wednesday, correct? I can rebook if needed. Sentence11: We are departing from cambridge on friday going to kings lynn. Arrival time should be around 09:00. Please book 6 seats. Sentence12: I am also looking for a train. Can you help me? Sentence13: Sure thing! Home from Home is a guesthouse in the North. With a moderate price range it is still a 4 star place to stay. Do you need more? Sentence14: Okay I've booked you on the TR2764 which will arrive at 8:58. the total fee is 58.8 GBP payable at the station . Reference number is : AQMKFOFZ . Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System