Use the following steps to create this report in Explore.

1. In Zendesk Explore, click the reports ( ) icon.
2. In the Reports library, click New report.
3. On the Select a dataset page, click Talk > Talk - Calls, then click Start report. The report builder opens.
4. Next, add a metric. A metric is the thing you want to measure, in this case, the number of declined and missed calls by agents. In the Metrics section, click Add.
5. From the list of metrics, choose Call routing to agents > Declined call legs and Missed call legs, then click Apply. 
6. Next, add the two attributes that will break down the number of tickets by assigned agent, and ticket channel. In the Rows section, click Add.
7. From the list of attributes, choose the following: Ticket > Ticket ID, Call leg agent > Leg agent name, Time - Leg started > Leg - Timestamp, and Call leg > Leg completion status, then click Apply.
8. You'll see something resembling the following table: 
9. To show only calls with a leg completion status of Missed and Declined, click the Leg completion status attribute you just added, select only Agent missed and Agent declined, then click Apply.
10. The report was by default named New report. Click the New report text and replace it with a title of your own.
11. Finally, click Save.