All airlines and hotels charge varying amounts for you to change name details, whilst others do not allow this at all.
All airlines require the name on the booking to be the same as on your passport but they only require your first and surname, middle names are not required.
If you have put Miss instead of Mrs (or any variation) then this is not a problem as it does not show on your passport. The gender does need to be correct.
Should you need to make a change, please contact our Customer Support team on 01 536 0820.