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: 1 room, and I'll need it for 2 nights starting Friday. Sentence2: No it doesn't. Sentence3: Booking was successful. Reference number is : B823WKVK . Sentence4: I am also looking for a train on the same day to Cambridge Sentence5: Yes, and Thank you kind person for helping me! Sentence6: I am looking for a place to stay. The hotel should be in the moderate price range Sentence7: Booking was successful, the total fee is 23.6 GBP payable at the station. Your reference number is S5436QTX . Can I help you with anything else? Sentence8: I would like a guest house, with free parking. Sentence9: I have three moderately priced hotels. Do you need internet and/or parking? Sentence10: Train TR5686 leaves london kings cross. Would you like a ticket? Sentence11: Does it matter what side of town it is on? Sentence12: Thank you goodbye. Sentence13: If everything is fine. Then I hope you have a wonderful day. Sentence14: You're welcome. It's really my pleasure. Sentence15: No that's everything. You've been great thanks. Sentence16: Ok how about acorn guest house. They are moderately priced and have 4 stars. How many rooms and how long is your stay going to be? Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System