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: Sorry, there are no rooms available for your specifications. Do you want to try a different day or a shorter stay? Sentence2: I also need to find something called gonville and caius college, can you help? Sentence3: I am looking for a gueshouse to stay in during my visit. I would like for it to be in the east section of town. Sentence4: There are no 4 star expensive guesthouses on the East side of town. Would you be interested in a cheap or moderately priced one instead? Sentence5: Try for 1 night instead. If that works, can I have the reference number? Sentence6: You are welcome. Have a pleasant stay. Sentence7: No problem, the postal code is cb21ta. Did you need the phone number as well? Sentence8: How about the Autumn House for 1 night starting Saturday and your reference number is SVCIWLWA . Sentence9: Yes please. Can you book the reservation for Saturday for 5 guests for a 2 night stay. Thanks. Sentence10: No thanks - I'm all set. Thank you for your help today. Sentence11: There are six entries, do you have any other preferences in hotel choice? Sentence12: Gonville and Caius College is located in the center of town on Trinity Street. Anything else I can do for you? Sentence13: I'd like a 4 star place that's on the pricier side. Sentence14: Autumn house is cheap and has free internet and parking. Would you like me to book a reservation for you? Sentence15: I would like one that is cheap then. Sentence16: Can I get the postcode? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User