A travel agent can provide detailed itineraries for you. But how do you know that you would love to see Pakistan if you have no idea of what to do there?
Do some research about both countries to identify what you would like to see and then work out how to get there.
Once you have an idea of what you would like to do and see in each country, post your questions in the relevant branch for each country.
For flights, look at Skyscanner.net, but also look separately at the website for Pakistan International Airways these flights do not turn up on most considator websites.
Getting a visa for Pakistan can be quite time-consuming.