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: There are 10 trains going to Cambridge from Ely on Monday. Is there a certain time you would like to depart by? Sentence2: Yes, thanks, I am also looking for a train. I'd like to leave on monday, heading to cambridge. Sentence3: thank you get for that. i will give them a call. Sentence4: So TR4724 leaves at 23:35 and arrives at 23:52 correct? If so that would be fine. Sentence5: Contact information for Fitzbillies Restaurant is telephone number 01223352500 Sentence6: Can I have the contact information for the Fitzbillies Restaurant. Sentence7: The travel time is 17 minutes. Will that be okay? Sentence8: I would like to depart from ely. Sentence9: That is correct. How many tickets will you need? Sentence10: What would the price be for that train? Sentence11: Train TR4724 is fine. What is the travel time? Sentence12: I can go ahead and book on my own, thanks. Thank you for the info. That was all I needed for today. Sentence13: Can I help you with anything else? Sentence14: Yes, I'd like to depart any time after 21:45. Do any trains fit that time frame? If so, could I have the train ID, travel time, and when it will arrive? Sentence15: Correction I apologize TR4724 leaves at 23:35 and arrives by 23:52. It's price is 4.40 pounds by the way. Let's find one leaving after 21:45. Sentence16: There is one train leaving after 21:45 on monday. It is TR4724, leaving at 23:52 for a duration of 17 minutes, arriving at 23:52. Sentence17: You're welcome. Good-bye. Sentence18: There are over 202 trains that arrive in cambridge on monday. Might I help find the best train by asking where you wish to depart from? Question: Who has spoken the sentence 16? (A) User (B) System
Output: 


Answer: (A) User