i have a k-1 visa now and applying for my permanent residency, im going to file I-485 (adjust status) together with my I-131 (application for travel document). in view of making a request for advance parole, i need to make a letter explaining why do i need to apply for an advance parole or travel document. i want to ask if anyone can give me or show me a sample of that letter, which i can use as a guide or from wherein i can have an idea of what its all about. any help would be much appreciated, thank you! 