Gasparyan and Alizadeh

This is the first time I wish to be in Iran for a concert: Hossein Alizadeh and Jivan Gasparyan are playing together in Tehran in the 4th, 5th ,and 6th of September. It is an open air concert in Niyavaran Palace; and it is going to be an improvisation by both of them.
I really wish I could be there.