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 have 202 results. Where would you like to arrive? Sentence2: I need it to arrive at Birmingham New Street Sentence3: Unfortunately I wasn't able to book that time for you. Would you like to try for another time or day? Sentence4: I have 15 trains leaving hourly on the :01 from 9:01 to 23:01. The trip duration is 163 minutes. What time would you prefer? Sentence5: Okay there are 19 trains making that trip do you have a time you prefer? Sentence6: Please book for 6 people the train that departs at 9:01. Sentence7: No problem at all! Remember that the Cambridge TownInfo centre is here for all your 411 needs! Sentence8: Clowns Cafe at 54 King Street City Centre would work well for you. Would you like me to book it? Sentence9: Thank you. That was all I needed for today. Thank you very much. Sentence10: Yes, I need a train out of cambridge on Friday. Sentence11: Booking was successful. Reference number is : SUTXD8Y6 . is there anything else I can help with? Sentence12: Sometime after 8:30, please. Sentence13: Yes please. Can you try 19:00 instead? Sentence14: I need 6 tickets please. Sentence15: I want to book a table for 6 people at 20:00 on thursday. Sentence16: I would like to find an Italian restaurant that's expensively priced. Sentence17: I can book you one that leaves at 05:00. How many tickets would you like? Sentence18: I successfully booked you on Train TR3732 for 6 people, total fee of 450.6 GBP. Your reference number is 2ZQNPAPB . Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User