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: Sure, I adjusted that for you, your booking was successful and the ref number is RP2PZDYV . Sentence2: I need to leave after 21:15 on saturday Sentence3: Sure! What day will you be travelling? Sentence4: TR0925 leaves cambridge at 21:00 and arrives in cambridge at 21:51. The price is 18.88 pounds. Would you like me to book it for you? Sentence5: That works I think. Sentence6: Would you like to book a reservation at this time? Sentence7: welcome and have a great day Sentence8: No preference on price and it doesn't have to include parking. Sentence9: Yes. Please book me 2 tickets and provide me a reference number. Sentence10: Yes, I need it for 2 people, staying 3 nights, starting wednesday Sentence11: Great, thank you! Sentence12: Would I be able to get a train from Cambridge to London King's Cross? Sentence13: I'm also looking for a place to stay in the north. I'd like it to have a rating of 4 stars. Sentence14: have a great day too Sentence15: I have the acorn guest house located at 154 chesterton road. Sentence16: Your hotel has been booked! Sentence17: Your reference number is VYR91INX . Is there anything else I can help you with? Sentence18: I need a hotel to stay in for the same group of people just for 1 night though, and a reference number too please Sentence19: thanks for using our service. Sentence20: I have 8 different guesthouses in the north. Do you have a preference on price? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User