Detailed Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: I've found plenty of places with free wi-fi. Is there a certain area you're looking for? Or a certain price range? Sentence2: It doesn't have to be in the moderate price range as long as it is a 3 star hotel with free parking. Please suggest one for me. Sentence3: I'm looking for a hotel in the west with a moderate price range. Sentence4: I found 5 hotels with free wifi and free parking. Is there a particular area or price range you prefer? Sentence5: Your booking was successful and the Reference number is IYGOHWCR . Is there anything else I can help you with today? Sentence6: Yes, I'd like to book there for 3 people for 4 nights starting Thursday and I would like a reference number. Sentence7: Yes. Please look for any hotels in the same price range Sentence8: I have found no places in the west in the moderate price range with 3 stars. Do you have a different area or price range you would like? Sentence9: It should have a star of 3 and include free parking. Sentence10: There is no availability at the Gonville Hotel for those dates. Would you like me to find another hotel? Sentence11: I actually found the Hobsons House which is a moderately priced 3 star guesthouse with free parking in the west part of town. Would it be okay? Sentence12: The gonville hotel is an 3 star, expensive hotel in the centre of town that has free internet and free parking. Would you like me to book it for you? Sentence13: You are welcome. Enjoy your stay. Sentence14: Thank you so much for your help. Sentence15: Yes, that would be fine. The Hobsons House sounds good. Sentence16: I am looking for a place to stay with free wifi. Question: Who has spoken the sentence 5? (A) User (B) System
A:
Answer: (B) System