I can't thank you enough for all that you have done for me. 
واقعا نمیدونم چجوری ازت تشکر کنم واسه همه کارایی که برای من انجام دادی.
I don't agree with what's happening. That's just my two cents. 
مخالف این اتفاقم ، این عقیده ی منه.
I will help you with whatever you need, just name it. 
تو فقط لب تر کن ، هر کمکی که بخوای برات انجام میدم.
No worries, I didn't need it after all. 
مشکلی نیست!درکل بهش نیازی ندارم.
Why so blue, is everything OK? 
چرا ناراحتی ؟ همه چی خوبه؟
I have to go to the restroom. Nature calls. 
باید برم دستشویی.
You're in a bad mood today. What's eating you? 
امروز دل و دماغ نداری ، خودتو اذیت نکن ( خودخوری نکن)
Shame on you, you know not to eat so much candy before dinner. 
خجالت آوره ، میدونی که نباید قبل شام زیاد شکلات بخوری.( خاک تو سرت )
Hang in there. I am sure things will work out in the end. 
صبور باش ، مطمئنم که آخرش همه چی درست میشه.
I don't have any money so can I get an I owe you. 
هیچی پول ندارم ، میشه ازت قرض بگیرم!
He asked for my phone number and I told him to take a hike. 
ازم شماره تلفنم رو خواست ، منم بهش گفتم برو گم شو .
take a hike=Get out of here.
"Go away.
I told them I had never done this before and they said it would be a piece of cake. 
بهش گفتم که تاحالا این کارو انجام ندادم ، بهم گفتند که خیلی آسونه.
Don't worry I'm on my way. 
نگران نباش دارم میام.
I didn't finish my report on time. I'm hosed. 
نتونستم گزارشمو سروقت تموم کنم ، تو بد شرایطیم ( تو بد مخمصه ای هستم )
I know you want to know what happened but it's a long story. 
میدونم که میخوای بدونی جریان چیه ولی توضیحش خیلی سخته.