Create Agile report of Resource Availability x Tasks Sums

We would like to create a report with the following information:

Data:

1. The sum of the estimated task hours for issues (stories) assigned to the users in the sprint;
2. In the spring planning meeting a single figure for each team member, they provided, which is their estimate about the amount of time they plan to spend in the sprint.

User case:

Sally might tell us she has 21 hours of time to devote to the sprint, but after totaling her tasks, that might come to say 25 hours in which case we have a problem to talk through with her, or say, 10 hours in which case we can distribute other work her way.