You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: Looking for a place to eat in the city center. Sentence2: I am looking for a moderately priced place to eat, I am also looking to book a room in the bridge guest house hotel. Sentence3: Yes, free parking and free wifi! Sentence4: The Bridge Guest House is a 3 star lodging. Sentence5: That was all the questions I had. Thank you very much for helping me. Sentence6: Which dates will you be staying at the Bridge Guest Room house? Sentence7: I'm happy I could help you today. Have a wonderful day! Sentence8: Does it provide free parking? Sentence9: The hotel is in the south area. Sentence10: I'd like to have some Chinese food. Sentence11: There are many options to choose from. Do you have a type of food in mind? Sentence12: OK, 2 questions. 1 - What are the moderately priced restaurants in the center of town; and 2 - how many stars does the Bridge Guest House have? Thanks! Sentence13: Before I commit I have a few questions. What area is the hotel located in? Sentence14: That narrows down the restaurant choices to 10. Is there a price range you would like to stay in? Question: Who has spoken the sentence 13? (A) User (B) System
Answer: (B) System