I'd appreciate it if you could...

John: I'd appreciate it if you could proofread this essay for me.

Alice: Of course, I'm happy to. When do you need it back?

John: By tomorrow afternoon would be great. I'd appreciate it if you could prioritize it.

Alice: No problem. I'll get to it right away. I'd appreciate it if you could let me know if you have any other documents that need proofreading.