The phrase "change of plans" refers to a situation where previously made arrangements or decisions are altered, revised or modified due to unforeseen circumstances, new information or unexpected events. Full definition
Travel insurance plans provide coverage for the domestic travel delay because of weather change, missed connections because of bad weather or any kind of change of plans because of natural disasters. (policybazaar.com)
If a date is going really well and it progresses at a different menu, let that someone know about your slight change of plans. (itsjustlunchblog.com)
Last minute change of plans, hair in a top knot and run run run! (thefashioncuisine.com)