Short answer: No
But...if you are extremely patient, you might be able to improve it.
Split the audio and import it into an audio editing program such as Audacity
Find a segment where nobody is speaking but the helicopter can be heard.
Make a "noise print"of the helicopter and subtract it from the section where the people are saying their vows.
Or, if they have a sense of humour, you could add subtitles, or ask them to repeat the words and you then dub this into the appropriate place in the video.
Good luck, and let us know how you get on.