It is not essential to say specific words when entering ihram
Question

                Is it essential for the one who wants to make a condition to say the exact words that were narrated from the Prophet (blessings and peace of Allah be upon him) or can he make the condition by saying any words that express the same meaning?.
Praise be to Allah.He does not have to say the exact words that are narrated, because this is not an act of worship in which the exact words have to be said, and as that is the case it is sufficient to express the same meaning. 
Majmoo‘ Fataawa Ibn ‘Uthaymeen (22/26) 
What is meant is that if one says words that have the same meaning as his words, “If I cannot complete ‘umrah then I have exited ihram”, that is sufficient.