Definition: Generate an appropriate title for the given text. The generated title must be short and include the main topic of the text. The preferred titles are under fifteen words.
Input: The Birmingham-born performer was forced to call off the first four nights of his No More Tours 2 due to flu, organisers said. The former Black Sabbath singer said he has since been diagnosed with bronchitis and cannot risk touring. Osbourne said he was "devastated" but determined to reschedule the dates. He has been diagnosed with a severe upper-respiratory infection which doctors warned could develop into pneumonia given the extensive travel schedule. The Grammy-winning singer and songwriter was due to perform in Dublin on Wednesday alongside Judas Priest, before heading to the UK on Friday and then to Munich on 13 February. The tour was to due to end in Barcelona in March. Organisers said they hope to reschedule the dates for September. Osbourne and Black Sabbath, who have been credited with inventing heavy metal music, finished an 81-date worldwide farewell tour in their home city in February 2017.

Ozzy Osbourne forced to postpone UK and European tour due to illness