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: That is perfect. Can I get the phone number and postal code please? Sentence2: I need to find a train from Cambridge. Sentence3: The train closest to your desired time is TR6053 which departs Cambridge at 19:50 and arrives in Ely at 20:07. Would you like to book a ticket? Sentence4: There are trains leaving Cambridge every two hours. Sentence5: What is the travel time on that train? Sentence6: I need one on Friday heading to Ely. I need to leave after 19:30. Sentence7: I am also looking for a place to go in the centre. Sentence8: We have many diverse activities in the center of town, from architectural landmarks to parks and pools to nightclubs like the Soul Tree. What interests you today? Sentence9: I'm not really picky, just something fun. What's your favorite? Sentence10: Travel time is 17 minutes. Sentence11: Yes, their phone number is 01223477900 and their address is 1-6 corn exchange street. Sentence12: Thank you for using our service. Goodbye. Sentence13: I would recommend Soul Tree Nightclub. It is in the centre area and the entrance fee is 4 pounds. Sentence14: Okay, thank you. That's all I need. Bye! Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User