Here is my situation: I want to book an award ticket for my uncle from Manila to Toronto. Along with a Canadian visa, he will also apply for a US tourist visa. So ideally he will get a ticket from MNL-YYZ and returning from NYC-MNL. If he already flies the outbound, can I still make changes to the inbound? Changes to the date and/or departure airport? Or would I have to make all changes before the outbound and do a redeposit and reticket? I plan on using CO miles. Thanks in advance!