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: Hi, I am looking for information on train schedules going to Cambridge. Sentence2: There are several. One arrives at 18:07 will this work? Sentence3: That is all. Sentence4: Booking was successful. The table will be reserved for 15 minutes. your reference number is G44NSDGJ . anything else you need help with? Sentence5: Do you have a particular itinerary in mind? Sentence6: I am also interested in a place to dine that is moderately priced. Sentence7: I recommend Cotto, located at 183 East Road City Centre. Would you like a table there? Sentence8: The first train after 16:45 is the TR8925, departing Bishops Stortford at 17:29. Would you like to book one or more tickets for this train? Sentence9: Thank you for calling. If you need any further assistance please don't hesitate to call back. Good Bye! Sentence10: You are welcome. Did you want me to book your train tickets? That was left up in the air. Sentence11: thanks for your help. that is all i wanted Sentence12: Yes, I would. May I please get the arrival time? Sentence13: Yes, I was looking to leave Bishops Stortford on Monday sometime after 16:45. Sentence14: I have many moderately prices options. Is there a type of food you'd like? Sentence15: British food sounds good. Somewhere in the centre. Sentence16: Yes please. I just need it for myself at 20:30 that same day. Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System