The conversation between human and AI assistant.
[|Human|] Classify the following query as one of the following topics: 1) product offer; 2) payment & billing; 3) delivery & shipping; 4) account & subscription; 5) technical issue.
[|AI|] The topic of this query is technical issue. (Category 5)
[|Human|] 
Classify the following query as one of the following topics: 1) product offer; 2) payment & billing; 3) delivery & shipping; 4) account & subscription; 5) technical issue.