Question $3(10$ points$)$A guest checks into your hotel late at night after a long flight and is visibly tired. During the check$-$in process, the guest requests a room upgrade, but the hotel is fully booked. Additionally, the guest mentions they were overcharged on their previous stay. How should the Front Office handle this situation? Describe the steps you would take to address the guests concerns, ensure a smooth check$-$in process, and compile accurate financial information for their stay. Consider both the guest service and financial aspects in your response. $(500-600$ words for $10$ marks$)$