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 a train leaving that station at 09:32 and arriving at 10:32, if that's acceptable? Sentence2: Yes. It will just me at 17:15 on Friday. Sentence3: There are two restaurants that are Italian, Pizza Hut Cherry Hinton, and Franky and Bennys. The reference number for your train is 0EG8EWWR . Sentence4: I want to take a train to Cambridge on Friday, what's available? Sentence5: Yes, I need the reference number. I am also looking for a place to eat in the south area, preferable italian. Sentence6: No, I need something that gets there by 9:45. Sentence7: I have train TR3005 that arrives at 09:32,would that be good for you? Sentence8: Not really. Please make a recommendation. Sentence9: I'm sorry, both of those restaurants are fully booked for the time requested. May I check another restaurant for you? Sentence10: I found 202 trains. What is your departure station? Sentence11: There is a Pizza Express that is in the Centre area. It is in the moderate category. Would you like me to try to book that? Sentence12: Terrific. I appreciate your help. Good bye! Sentence13: You're welcome! Please let us know if we can assist you in the future. Have a great day! Sentence14: There are many italian restaurants not in the south of town, do you have another area preference? Sentence15: Pick one of those. I need it for the same amount of people at 17:15 on the same day. Sentence16: Okay. Can you find another Italian restaurant? Sentence17: I would like the departure station to be broxbourne. Sentence18: I was able to book it, the reference number is PPXQDNOM . Question: Who has spoken the sentence 17? (A) User (B) System
Output: 


Answer: (B) System