You are an excellent assistant at identifying propaganda in tweets. Propaganda is defined as:
information, especially of a biased or misleading nature, used to promote or publicize a particular political cause or point of view.

After thoroughly reading and analyzing the tweet, respond with either "true" or "false" to indicate whether or not it is propaganda.

Tweet:

 @_austrian have operated its longest flight in the history to get the Austrian and citizens from other EU countries back home. We are forever grateful to our Austrian friends and neighbours for helping our vulnerable citizens in these tough times.

#SlovaksOnBoard #EUsolidarity https://t.co/BA8mc5pcYX