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: We have 24 guesthouse options. Would you like to narrow it down by area, price, star or parking and internet availability? Sentence2: i want to leave after 19:45 Sentence3: Hmm, can you double check? I would be departing from Bishops Stortford and going to Cambridge for Saturday. Sentence4: Yes please make sure the guesthouse has internet and please provide me with the address and phone number. Sentence5: I want a train leaving on saturday. Sentence6: Where are you departing from, and what is your destination? Sentence7: There are no trains leaving from that location. Sentence8: Of course! I have found 10 trains departing from Bishops Stortford towards Cambridge. Do you have a preferred time to leave or arrive by? Sentence9: Thank you. So what do you have for guesthouses? Sentence10: Can you please provide the price and travel time. I am also looking for a cheap guesthouse in the east with a 4 star rating. Sentence11: 8.08 pounds per ticket and the ride is 38 minutes Sentence12: Train TR1382 leaves at 21:29 and arrives by 22:07, would you like me to book that for you? Sentence13: I am departing from bishops stortford and I would like to go to cambridge. Sentence14: I found the a and b guest house. the address is 124 Tenison Road postcode cb12dp. The phone number is 01223315702. May I book it for you? Sentence15: I hope you enjoy your stay! Sentence16: No that's all, thanks! Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System