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: I need a train leaving from London Liverpool Street on Monday. Are there any trains available? Sentence2: Wonderful! What can I do to help you plan? Sentence3: That would be great. What is the attraction type? Sentence4: Actually, I don't need for you to book it, but I do need some suggestions for places to go in the west part of town. Any type of attraction. Sentence5: No thank you. Can you provide me with the arrival time, price, and train ID? Sentence6: TR9202 costs 16.60 pounds per ticket and arrives by 17:07. Will that be all? Sentence7: Can you tell me how many people will be travelling? Sentence8: It is a museum, and admission is free. Can I help you with anything else? Sentence9: That's all I need, thanks so much for all of your help! Have a great day! Sentence10: yes, book it please. Sentence11: I would like to leave after 14:00 and go to cambridge. Sentence12: How about the cafe jello gallery? It is in the west and it's free. Sentence13: You are very welcome. Have a great day! Sentence14: We do have some trains, what time would you like to travel? Sentence15: TR9202 would be perfect for you. Shall i book it ? Sentence16: I am planning a trip in Cambridge. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User