All Praise be to Allah,
Contrary to what some ignorant clerics say there is nothing wrong with using a knife and fork or other cuttlery for eating, infact it is said that the fork was first used in the Islamic World. What should be kept in mind however is that one uses the right hand for eating and left for cutting (as opposed to left for eating and right for cutting as in many countries) because there are narrations of the Prophet (S) which go as follows:
Once a man ate with his left hand in the Prophet’s (peace and blessings of Allaah be upon him) presence he (S) said, “Eat with your right hand.” He said, “I cannot.” He said, “May you never be able to!” Nothing was stopping him but his stubborn arrogance, and he never raised his right hand to his mouth after that. (Reported by Muslim, 3776)
“When any one of you eats, let him eat with his right hand, and when he drinks, let him drink with his right hand, because the Shaytaan eats with his left hand and drinks with his left hand.” (Reported by Muslim, 3764).
Eating with the left hand is bad table manners and forbidden in Islam.
There is also nothing wrong with eating at a chair and dinning table.
May the Peace & the Blessings of Allah be upon the Prophet, his Aal and his Companions.