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 would like a guesthouse. Sentence2: I have TR4604 leaving at 11:59 and arriving at 13:27. Would you like to make reservations? Sentence3: I'm sorry, but your message is ambiguous. Would you like to stay in a guesthouse, or in a hotel? Sentence4: Okay what is your price range? Sentence5: Would you like me to book it for you and get a reference number ? Sentence6: I would prefer a guesthouse in the cheap price range. thanks Sentence7: I'm not sure but it needs to have free wi-fi. Do you have some with those specifications? Sentence8: I need a train leaving after 11:00 on wednesday if you can help me. Sentence9: I Need a cheap guesthouse with free wifi. I would like it to be a hotel. Sentence10: okay when are you planning your stay so I can book the room Sentence11: Certainly. Where would you like to go? Sentence12: I need to go from Cambridge to London Liverpool Street. Sentence13: Yes please make a booking for 1 people. Sentence14: there are nine places that are cheap guesthouses and offer free wifi and free parking. if you know an area i can narrow it down or i can suggest one. Sentence15: I was able to book you for train TR4604. The total fee is 16.6 GBP. The Reference number is : IG31YH6P . Sentence16: I am open to any area, whatever you suggest is fine. Sentence17: We have many to choose from! Is there an area in town you want to stay in? Sentence18: I need to find a place to stay. Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User