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: Can you look up info for a train ticket? I need to leave cambridge and go to stansted airport thursday at 20:00 Sentence2: Glad to be of service. Have a great day. Sentence3: I'd like to go the the theatre and then maybe out for a drink. Sentence4: I tsounds like to needed to arrive by 20:00 right? If so, TR5476 will get you there by 19:08. Sentence5: get me their post code. i also need a train Sentence6: What is the arrival time, and travel time please? Sentence7: Please book me two tickets and send me the reference number. Thank you Sentence8: The postcode is cb58as. Sentence9: Again, thank you for contacting Cambridge TownInfo Centre. Goodbye. Sentence10: Reference number is : 17XBF5X5 . Is there anything else? Sentence11: Great! That is all that I needed to know. Thank you so much. Sentence12: have yourself a safe journey. Sentence13: Okay, how about the ADC theatre on Park Street? Sentence14: Thanks. That's all I need. Goodbye. Sentence15: You're very welcome! Can I help you with anything else? Sentence16: Is there anything fun to do in the centre? Sentence17: No. That is all for today. Sentence18: I can recommend any of 44 options for you in the centre area, what would you consider to be a day of fun? Sentence19: greate day to youu too Sentence20: how about TR9751? it leaves at 23:40 Sentence21: I'm sorry for the confusion. I actually need to leave after 20:00. Do any trains run on that schedule? Sentence22: You'll arrive at Stansted Airport at 24:08. Total travel time is 28 minutes. Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System