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 was able to book you a room for 1 night at the guesthouse. The reference number is NEZYKV5E . Is there anything else I can do for you? Sentence2: The arbury lodge guesthouse is the north area with free parking and wifi. Would you care to book a room here? Sentence3: I'd like it to have free parking and free wifi. Sentence4: Alright, can you try for just one night? Sentence5: I am visiting in the northern area of town. I need to find me a place to stay for the night. Can you help? Sentence6: The Arbury Lodge is unavailable for 3 nights on Saturday. Can you select another day or for fewer days? Sentence7: No, that should do it. Thanks so much for your help! Sentence8: Have a great day! Sentence9: Is the Arbury Lodge moderately priced? If so, I would like to book a room for 1 person for 3 nights on Saturday. Sentence10: There are 11 guesthouses and 2 hotels in the north. Do you have a preference as to type or other requirements? Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User