You are tasked with using a large language model to categorize customer support tickets. Write a complete, self-contained prompt that instructs the model to classify the following customer ticket into one of these categories: 'Billing Inquiry', 'Technical Issue', or 'Account Management'. Your prompt must not include any pre-existing examples of classified tickets.

Customer Ticket Input: 'I can't seem to log into my account. I've tried resetting my password, but it's not working.'