Hi, we're paired for the Ubers Last Chance R1. I'm GMT-4 and can usually do 3:30 to 4:30 PM on weekdays, though late night also works (10 PM onwards). I can also do 9:30 AM to 11:15 AM on Monday & Tuesday tho youd need to let me know ahead of time and i can do all day Wednesday tho I'd prefer afternoon. I'd rather not play weekends and i cannot do after wednesday so lmk asap.
Since you tried to schedule then thats all you can do. If he doesn't attempt to get back to you then you get an activity win at the end of the round and advance to round 2. There won't be any more substitutes so other than reminding your current opponent you can only be patient.