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: Thanks! For all your help. Sentence2: I want a cheap price range, please. Sentence3: Is there anything else you need? Sentence4: Good news! Your booking has been successful. Your reference number is 5KCBOHZB . Sentence5: Great, can I have it for 4 people for 2 nights on wednesday and also I need a reference number? Sentence6: I would like it to arrive by 20:30 please. Sentence7: There is the Alexander Bed and Breakfast thich is 4 star and has free parking and wifi. Sentence8: You're welcome, goodbye. Sentence9: I'm also looking for a train to Cambridge that departs from Bishop's Stortford that departs on Wednesday. Sentence10: I have over 10 options. Do you have a preference for a departure or arrival time? Sentence11: Nope, that's it. Thanks! Sentence12: There are 29 choices. Do you have a preference in the area of town and price range? Sentence13: I have booked for you Train Tr9178 the total fee is 40.4 GBP payable at the station. Your Reference number is : IKRVR8G2 . Sentence14: I'll take the train that arrives closest to 20:30 for 4 people please. Sentence15: Hi. I'm looking for a place to spend the night, and I want somewhere without any hidden fees for parking or wifi. Sentence16: There are 8 trains that will arrive by the time you stated. Do you have a preference on what time you leave at? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User