When i take part in a behest and form a party people say stuff like "please to meet you" and when it's complete " we should party again sometime". How do i do this?? Is it something to do with macros??

Also i always see people shouting similar text which contains stuff like " do you need it" and different coloured brackets. It all looks like preset text to me but im not sure where it is or how to perform it.

Thanks.