NEW YORK, June 19 Ge
* Ceo says 'there will be an adjustment to the overall purchase price' in alstom deal as a result of modifications
* Ge ceo says can't speak for alstom board but believes they see revised bid as "a good combination of certainty and value."
* Ge ceo says still confident in success of alstom bid
* Ge ceo says 'we had a great constructive dialogue' with unions today on deal
* Ge ceo says june 23 deadline for final decision on bid 'remains intact' Source text for Eikon: Further company coverage: (Reporting By Christian Plumb)