To speak about greetings, you need the appropriate vocabulary.
Purpose - why you do something or why something exists;
Establish - to start having a relationship with, or communicating with another person, company, country, or organization;
Universal - existing everywhere or involving everyone;
Acceptable -  satisfactory and able to be agreed to or approved of;

Imply - to communicate an idea or feeling without saying it directly;
Response - an answer or reaction;
Respect (noun) - admiration felt or shown for someone or something that you believe has good ideas or qualities;
Nee - used after a woman's married name to introduce the family name by which she was known before she married;
Neutral - not saying or doing anything that would encourage or help any of the groups involved in an argument or war;
Formal circles - official group of people;
Neighbour - someone who lives very close to you.

The purpose of the research is to try to find out more about the causes of the disease.

There is a strong need to establish effective communication links between staff, parents, pupils, and external bodies.

Love and relationships will always be a topic of universal interest.

Her proposals met with an enthusiastic response.