I don't know how to solve this situation.

Immediate response is necessary.

This issue needs to be addressed urgently.

This bus schedule is very inconvenient.

We need to resolve this inconvenient situation as soon as possible.

We should deal with this inconvenient situation as soon as possible.

We must resolve this inconvenient situation as soon as possible.

Your cooperation is needed for this project.

I need you.

It will take time to solve this problem.