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: I'm also looking for a cheap place to eat in the centre area, what do you recommend? Sentence2: Sorry for the confusion, I booked the restaurant for you and the reference number is 6UDMBSI2 . Anything else today? Sentence3: I would prefer portuguese food please. Sentence4: You are welcome enjoy ! Sentence5: Oh great. your booking was successful and your reference number is EBL4A5DL . Sentence6: It's a guesthouse in the north. It's cheap, and has free wifi and parking. Would you like a room? Sentence7: I need a taxi. I want to be taken from the hotel to nandos city centre, arriving by 17:00. Please give me the car and contact information Sentence8: I cannot book it for you. Would you like any more information? Sentence9: Nandos City Centre is located at 33-34 Saint Andrews Street. Would you like me to make reservations for you? Sentence10: Yes please. We will be arriving on Sunday for 3 nights. There are 7 of us. Sentence11: Yeah I want a table for 7 people on sunday at 18:00 Sentence12: Is the 17:00 time slot available for 7? Sentence13: There are many is there a type of food you'd prefer? Sentence14: Can you tell me about the city centre north b and b hotel? Sentence15: I can book it for you at 17:00 but I need to know what day, I can do Monday for you. Sentence16: Thanks for all of your help you've been great! Sentence17: Your all set! A blue volkswagon will be picking you up the contact number is 07525527431, is there anything else I can assist you with today? Sentence18: Is there another restaurant in that area with portuguese food? Question: Who has spoken the sentence 14? (A) User (B) System
Output: 


Answer: (A) User