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 many trains that meet your request, do you have a departure or destination in mind? Sentence2: TR5693 meets all your criteria and arrives by 10:35. Will that work for you? Sentence3: Yes, I need to get to Cambridge. I'll be leaving Norwich. Sentence4: That is all for now. Thank you. Sentence5: I'm looking for a train that leaves on saturday and arrives by 19:00. Sentence6: There is a train on saturday that leaves at 8:16am. Shall I book it? Sentence7: It will be on Saturday as well. Sentence8: No thanks. I'm looking for a place to stay too. Sentence9: Booking was successful. Reference number is : 8XPJYIR0 . Is there anything else I can help you with? Sentence10: What time does that train arrive in Cambridge? That seems terribly early. I just need to be there by 19:00. Sentence11: The train should depart from norwich and should go to cambridge. Sentence12: That sounds good. What's the travel duration on that one? Sentence13: I'd like it to be moderate, any will do. And I'd like to book it for 5 people and 4 nights, starting on the same day. Sentence14: Starting what day? Sentence15: I have the avalon guesthouse in the north area. Would you like that one booked? Sentence16: No problem at all, have a great day. Sentence17: Yes please, for 5 people and 4 nights. Can I please get the reference number too? Sentence18: It is 79 minutes. Sentence19: I can definitely help with that. First of all, may I ask where you will be leaving from and heading to? Sentence20: Okay. Can you help me find a place to stay? I would like it to be 4 stars and I don't need it to have free parking. Sentence21: The train arrives in Cambridge at 9:35. Would you like me to book that for you? Sentence22: There are a lot of options to choose from. Do you know what part of town you'd like? In the north I can recommend Arbury Lodge Guesthouse. Question: Who has spoken the sentence 20? (A) User (B) System
Output: 


Answer: (A) User