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: 5 nights, and I will also need the reference number. Sentence2: How about TR2178? It arrives 21:24. Sentence3: no, thanks for your help though! Sentence4: Allenbell is available, would that work for you? Sentence5: Can you please give me the departure point, the day and time you want to leave? Sentence6: I'm leaving Cambridge on Thursday and need to be in peterborough by 21:45. Sentence7: That's good. Could you please tell me the price and departure time? Sentence8: If it helps, I do not have to have internet. Please tell me my options. Sentence9: How many nights will you be staying? Sentence10: Yes, that would be fine. Thanks. Sentence11: Would you like me to book it for you? Sentence12: Yes, please, for 5 people on saturday. Sentence13: you are welcome, any time. Sentence14: I also need a train to Peterborough. Sentence15: The price is 16.50 pounds. Departure time is at 20:34. Would you like me to books seats for you? Sentence16: I'm looking for a cheap place to stay in the east. Sentence17: great, i have three options for you. Sentence18: Booking was successful. Reference number is : TJLZZC10 . Will there be anything else today? Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System