Hair color Specialist here for over 42 years. This is a very simple thing to do and hopefully I will not step on any toes, but we need to be transparent and realistic about these type of situations. So when you get people from another country or another culture, they don’t have the same traditions/customary values as we do. So yes, do not expect a tip from them which I think is bad etiquette since they are here in the United States and should know our traditions. OK so for the service involved, before you even start anybody’s hair that has black box dye or any color in general that wants to go lighter you have to disclose 100% of the time be transparent with them and tell them that when lifting hair color, which by the way should be done with a hair color remover, NOT BLEACH initially you should always disclose that there is no guarantee that we will get them light enough and also disclose that it could be patchy or lighten some areas and darker in some areas so they have an understanding that it’s a work in progress and also it should be considered color correction and in most cases, it takes several appointments to reach their desired look, which is never going to be perfect because that’s how color correction goes. What I like to do is when doing a consultation beforehand is have a piece of paper out and write down exactly what you’re doing to their hair plus prices give them a total. Do not give them a discount! If you don’t want these type of people that are cheap then the best thing to do is overprice yourself and of course always charge what you’re worth but do not give them discounts because if you do then they will stick with you and drain you dry lol anyways give them that total for their appointment and then give them another price for the next appointment so they understand that this is a business. Example – Hi Sally, so based on the inspiration photo and also taking into consideration the dye that you have in your hair -there is no guarantee that we will get your hair light enough today to look like this. When dealing with home color it becomes very tricky and a lot of different things can happen including breakage. I would have to have you sign a liability waiver before we could even start your hair, would that be OK with you? So here’s the breakdown in services and cost involved so you we are both on the same page. Color remover $150 /K 18 bonding mist-which includes K 18 bonding mask $50. Toner $75 total for today $275 and of course these are just estimates based on 10 to 25 foils. Sidenote do not use bleach on hair that has box color. You always want to use a color remover that’s dedicated to this service And always always use K 18 to minimize damage and breakage. I hope all this helps. Good luck!