Every country has it own codes of etiquette.For example it is common for North Americans
and the British to use first name very quickly, even in a letter or fax or telephone call.
Such instant familiarity is much less acceptable in the rest of Europe and Asia
Where business partners and colleagues of mane years' acquaintance address each other by the
equivalent of Mr. or Mrs. and the last name or job title.
++++++++++++++++++++++++
One should interrupt and try to help speakers who may have difficulty in saying what they want to say.