1. you just don't have the time
2. your not comfortable doing it.
3. tell them you don't even to your own.
then,get the phone number ready of a tailor in your area, and give it to them..a business card from whoiever does do it,would be good.
i do not hem or make altertions..
i replace buttons on my brothers white work shirts cuz the dry cleaner crushes them all eventually. that is the only thing i do that is non quilting. and only for him!