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

Sentence1: That is perfect. Can I get the phone number and postal code please? Sentence2: I need to find a train from Cambridge. Sentence3: The train closest to your desired time is TR6053 which departs Cambridge at 19:50 and arrives in Ely at 20:07. Would you like to book a ticket? Sentence4: There are trains leaving Cambridge every two hours. Sentence5: What is the travel time on that train? Sentence6: I need one on Friday heading to Ely. I need to leave after 19:30. Sentence7: I am also looking for a place to go in the centre. Sentence8: We have many diverse activities in the center of town, from architectural landmarks to parks and pools to nightclubs like the Soul Tree. What interests you today? Sentence9: I'm not really picky, just something fun. What's your favorite? Sentence10: Travel time is 17 minutes. Sentence11: Yes, their phone number is 01223477900 and their address is 1-6 corn exchange street. Sentence12: Thank you for using our service. Goodbye. Sentence13: I would recommend Soul Tree Nightclub. It is in the centre area and the entrance fee is 4 pounds. Sentence14: Okay, thank you. That's all I need. Bye! Question: Who has spoken the sentence 6? (A) User (B) System
Answer: (A) User