I just started grad school this semester. But as part of my stipend contract, I am required to continue to apply to scholarships (although I don't need to win them). I have not been in grad school long enough for my advisor to know my work (in fact, we haven't even started on the research yet). So I would have to ask the two professors I previously asked for a LoR last year to write me another one. But I am afraid this will be really awkward since I haven't spoken to them in months and I feel like I'm just asking them to do me favours now. Especially since they are already aware that I am in grad school, and I will just be asking them to write me another letter. How do I phrase this email to them to prevent the awkwardness?