I have a OWE5 booked starting September (with South America as one of the continents) and my TA has allocated me two dummy dates for flights SCL-IPC and IPC-SCL.

When I come to actually change these dates, am I going to have a problem getting a reservation in D, given that LanChile only flies to IPC twice a week? I would like to avoid being held up in SCL for a flight out or worse, stuck on Easter Island for weeks on end!