If you are traveling to a conference, your flight reservation should fit the event's actual schedule: arrive with enough time to reach the venue, attend the sessions and leave after your final commitment. A planned business-trip itinerary is usually easier to understand when it follows the event dates rather than a generic week-long tourist route. You can document that plan before purchasing your final airfare if the relevant application accepts a reservation.
Imagine a marketing professional attending a three-day industry conference in Berlin from May 18 to May 20 next year. They plan to fly from Dubai on May 17, spend four nights near the venue and return on May 21. The extra night after the last session allows for an evening networking event and a morning airport transfer. This is a plausible, purposeful trip—not an itinerary stretched to fill a form.