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[Music] hi everyone welcome back to techno on tech TV in this tutorial I will show you how to draw an ER diagram for Airline reservation system so if you dont know how to draw an ER diagram and what are the components of ER diagram then I have added the video link on the upper right corner of your screen so watch that video first ER diagram for online Airline reservation system is a visual presentation of entities and relationships of Airline reservation system software database so here I am taking only six entities users ticket flight payment Airline and class so here users are customer and admin so customer and the admin are the two parties which are allowed to have access to the database of the system and have different view level of schemas to the database information now lets define the relationship between all the entities so there will be two relationship between user and ticket that is book and cancel user can book the ticket as well as he or she can cancel it next relationsh