How do you react with an angry customer?

Don’t Take It Personally, Never Argue Back, Kill Them with Kindness, Be Patient, relieve Your Stress,

to the eye contact and very polite and profosnal manners         always lisson and do  needful to the custer make them loyalty customer                                      

Your response towards the customer and smile will cool down so, politely have conversation and keep smiling with the customer and ask for help what he/she needs. 

When I was working at a debt collecting agency you can believe I received phone calls from raging customers every single day.
I just put the phone on my desk and continued working, when the customers had yelled and screamed and called names they usually were capable to talk in a sophisticated manner..
That's when I continued listening to what they wanted to say.
Being angry is very childish behaviour, adults are capable of managing their anger.

listen to the customer ,and try to find what makes him angry then try to find asolution to the problem

i will handle with humble way with angry.becoz smart coustomer officer ract like smart way beocz customer loser mean.you are loser 

With the sweet tongue and good communication skills how to convince the customar

we can show that we are responsive and willing to help.
Try  to build a rapport over the phone: Voice tone – Pace – Language – Listen actively – Concentrate – Show interest – - Don't interrupt.
- Don't take the criticism (judgment) personally.
- keep irate customers out of the public eye.
- Don't blame.
- Don't argue.
- Be warm and friendly.
- Be professional.
- No false promises.

It really depends on what your customer is angry about.
Is he having technical issues ? Did he not get his parts delivered ? Did he receive wrong parts? Is he not happy with the service ? ....etc.
Based on these situations you can communicate with your customer more effectively to cool down the situation.
Nothing fuels a customers anger more than someone who does not understand the problem.

اتقبل غضبه واتعامل معه بهدوء في الوقت ذاته اتسأل بيني و بين نفسي عن سبب غضبه و ابحث عن طريقة التواصل المناسبة مع هذا الزبون _ اعامل زبوني عل اساس انه دائما على حق  

Deal with the customer on the basis that there nothing personal with him.
also try hard to understand the cause of his anger and showed his interest in solving his problem.