Please choose the correct ending to complete the given sentence: Travel: [header] How to complain about your hotel stay [title] Contact the person at the front desk. [step] Your first step in complaining about a hotel stay is to talk to the person at the front desk of the hotel. This person will serve as your initial point of contact for lodging a formal complaint or seeking some sort of rectification.

Ending1: [substeps] This person must be at the front desk when you start complaining about your hotel stay. Some hotels charge by week and sometimes even month. Ending2: You can visit a vending machine and ask this customer for a receipt. [substeps] Contact this person to let them know that they have provided you with this receipt and that they still have it. Ending3: You can do this during or after a hotel stay. [substeps] Approach the front desk calmly and politely. Ending4: [substeps] This person can be a friend, an assistant, or even an employee at a hotel. If you call the person and the receptionist asks whether you need more details, answer briefly and ask about the hotel stay.

Answer format: ending1/ending2/ending3/ending4