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: What is the cost per ticket? Sentence2: Certainly. Where are you departing from? Sentence3: Okay thank you very much. Sentence4: I am so sorry for the misunderstanding. I don't wish to book at the moment. I am all set. Have a great day. Bye. Sentence5: I'm sorry, I may have misunderstood. The train hasn't been booked yet, should I book it for you now? Sentence6: There are eleven trains that will get you there by then, for how many people? Sentence7: The price is $9.80 pound per ticket. Would you like to book it? Sentence8: We are happy to help. Can I assist you with anything else? Sentence9: I's sorry, I meant to say LEAVING from Cambridge on Tuesday, heading to King's Lynn. I need to arrive by 16:00. Sentence10: No, that's everything. Sentence11: How many people will need a ticket for the train? Sentence12: No problem. You have a great day also. Bye. Sentence13: No, that's all, thank you! Sentence14: I need some help finding a train. I'm going to Cambridge on Tuesday. Sentence15: Sure, go ahead. Thank you. Sentence16: Alright, you're booked. Anything else you need from me? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System