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. Thank you that's all I needed today. Sentence2: Thanks so much. Could I bother you to help me find an expensive Chinese restaurant? Sentence3: I need the price for the train that leaves at 10:40 for one and the arrival time. Sentence4: The price is 75.10 per ticket and arrives at 13:23 Sentence5: I have a trip on wednesday and I need a train that departs from birmingham new street. Sentence6: TR7940 leaves at 10:40. Would you like me to book some seats for you? Sentence7: The train should depart from birmingham new street and should leave on wednesday. The train should leave after 10:15 and should go to cambridge Sentence8: Yes, please book two seats for me at 10:40. What time will it arrive in Cambridge? Sentence9: We have several. What part of town would you like it in? Sentence10: No preference. But please make sure I get the address. Sentence11: You will arrive by 13:23. I have 2 seats booked for you, and the reference number is RBQLUN8O . Is there anything else I can help you with? Sentence12: there are many that day. can you specify your destination? Sentence13: You're welcome. Have a great day! Sentence14: i recommend a place called Hakka. they are located on milton road chesterton. Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System