Hey I completely forgot to mention this, cause I'm at work and write these in chunks and lose grip. So if possible give them your dates for your travels. They will act accordingly in regards to your dates. I remember after I asked for the urgent processing (and I gave them my travel schedule), they deliberately scheduled my test on a later date as I wasn't in the country to take the test sooner. I was supposed to get my test on the last week of March but they gave it to me on April 5th, almost a week after my trip, so I can have a buffer time.
So they definitely look into your request, expedite it or not, it's their decision, but for sure give them your dates.