A Sequence Diagram template is the interaction diagram that shows how operations are carried out, such as what messages are sent and when they are sent. Time is used to organize sequence diagram templates . As you scroll down the page, the time passes. The objects added in operation are listed from left to right in the order in which they appear in the message sequence. The diagram mentioned below illustrates the steps involved in making a hotel reservation. A Reservation window is an object that starts the message sequence. A sequence diagram is a tool that shows the sequential interaction of things in a system. Teams use the chart to gain a better understanding of their work processes.