When you are offering something and customer doesn't want to buy, how many times you need to hear the word "no" from the cx to stop pitching?

It depends on who the Customer is.

For instance, if he/she is the Chief of staff, I would pitch in once again, since its not more often you get appointments.

If thats with a group or team of Product Development, It is okay to convince though they say multiple no, since it will become a constructive debate.

PS: Expect the worst at any cost before convincing which is the main skill you require for Sales.

three words are enough, otherwise be prepared for worst..

It's about reading the customer mind for interest in knowing the product/service in context. It's always good to filter out the prospects or may be check within the defined target customers. Just in case your sales role doesnt allow to take that Step1 and bang on to any body to convert into sales, go with a success story in hand to avoid a 'No' in the firstplace. Still if a 'NO" is on the cards, record a reason why this could not impress him.

The customer's time is the priority, one must convince them in the shortest time possible, the strategy is to empathize with the customer and explain the qualities of the product as well as the advantages. Demonstrating the quality of the product is very important, and the seller's persuasion is the key to a safe sale.

If the customer is blindly saying a no, better take time to educate about the product eventhough if they say no, else, if the product is well understood, or if the customer is in hurry, better to take the contact details and leave him/her for the moment. 

Do not stop trying ever, try to understand why customer says "NO" and how to make his say "YES". Sales is only about listening, not talking. Listen and give a solution.

It all depends on the situation, you have to get the feel of the customer and if you follow the correct procedure of the 6 steps to a successful sale then it will be 3 times. If anybody needs to know the six steps, they can employ me as training manager and I shall share my secret.

Once, normally i want to satisfy my customer need

There can be multiple times, but our concern should be why he/she is refusing to buy and is he/she the right person for what we are offering.

not more then 4 time any customer  if you had make your fist impration to him then i thing the 4 visit is the order in your hand 

If the customer says first time "NO" we can take it in two way.

1.Customer didn't hear your Offer in a clear manner.

2.He/She Really don't want your offer.

note: 1 or 2 it depents on customer reacts to your offer.

If you thing Option 1 is applicable then you can push your customer to 2 and 3 rd time not more than that.

If its Option 2 then you have to accept that what you are offered was not really attractive.  then go for next offer don't push them for 2nd time. if you done 2nd time Customer may reject your next offer to.