The ways you can contact each Airline are different and are stated on their websites.
If you don't know the web address of your Airline, find it on the list of airlines operating at Bologna airport.
Other questions on the same topic
What is the maximum allowed weight for hold luggage?Contact your airline to find out about the allowances of weight and size.
What are the allowed weight and size of the handluggage?
Contact your airline to find out about the allowances of weight and size.
Why am I unable to check-in online?
Some airlines have additional requirements that must be met to access online check-in, so if you are unable to check in online, contact your airline to obtain information about how the online check-in service works.